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Luk 04-121 Clutch Kit
| Brand | Luk 04-121 |
|---|---|
| Clutch Diameter | 13-9/16" |
| Clutch Disc Diameter | 11-1/16" |
| Clutch Disc Spline Quantity | 10 |
| Clutch Plate Facing Outer Diameter | 11" |
| Input Shaft Diameter | 1-1/8" |
| Kit contents | Cover Assembly, Clutch Disc, Release Bearing, all Necessary Pilots, Accessory Pack |
| Number of clutch disc springs | 4 |
| Pressure Plate Type | Push Type Diaphragm |
| Fits | Chevrolet and GMC · 91 vehicles |
OE supplier heritage. Built to the performance specs used for original-equipment applications.
Complete clutch kit. Includes the cover assembly, disc, release bearing, pilots, and accessory pack.
Push-type diaphragm. A proven pressure plate design for smooth, consistent clutch engagement.
Cross-references AMS Automotive 04-121, Sachs K70375-01 and 04-081K for the same application. See all 9.
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LuK 04-121 Clutch Kit Overview
LuK 04-121 is a transmission clutch kit built for manual-shift Chevrolet and GMC truck and van applications from 1991-1995. It combines OE-style clutch components with application-specific release hardware details to support proper pedal feel, smooth engagement, and reliable drivability.
Compatible With 1991-1995 Chevrolet C1500, C2500, K1500, K2500, Blazer, and P30 applications, as well as 1991-1995 GMC C1500, C2500, K1500, K2500, P3500, this kit is specified for vehicles that use a push-type diaphragm pressure plate.
- Push type diaphragm pressure plate design
- 11-1/16" clutch disc diameter with 11" facing outer diameter
- 1-1/8" input shaft diameter and 10-spline disc configuration
- 4-spring clutch disc construction
- Kit contents include cover assembly, clutch disc, release bearing, necessary pilots, and accessory pack
- OE-supplier engineering for application-specific performance specifications
Detailed Product Description
LuK develops clutch specifications as an original-equipment supplier, and that engineering approach carries into this 04-121 clutch kit. The assembly is built around a push type diaphragm pressure plate and a large 13-9/16" clutch diameter, with an 11-1/16" disc and 10-spline hub to match the listed drivetrain requirements. For Chevrolet C1500 clutch kit, GMC K2500 clutch kit, and related heavy-duty truck applications, the goal is consistent engagement and correct fitment to the transmission input shaft and release system.
This part cross-references Sachs K70375-01 for the same application.
Common Problems This Kit Can Address
- Clutch slip under load
- Hard or inconsistent clutch engagement
- Chatter or shudder during takeoff
- Noise from worn release components
- Poor pedal feel caused by worn clutch hardware
Installation Notes and Tips
Verify release bearing and fork attachment before installation, especially on 1991-1995 Chevrolet and GMC applications noted with LB179 service references. Some 1991-1994 vehicles also reference LB177 for hard pedal or noise concerns and LB135 for squeak elimination. Confirm the input shaft diameter, spline count, and clutch disc diameter against the vehicle’s transmission before assembly.
Quality Assurance
LuK is an OE supplier with extensive in-house manufacturing content, and this clutch kit reflects that application-focused approach. The brand’s aftermarket clutch components are widely used by professional technicians for manual transmission service on Chevrolet and GMC trucks and vans.
This part fits 91 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1995 | Chevrolet | Blazer | 4.3L | V6 | N/A | Refer to LB179 Regarding correct Release Bearing/Fork attachment. |
| 1995 | Chevrolet | C1500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | Chevrolet | C1500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | Chevrolet | C2500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | Chevrolet | C2500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | Chevrolet | K1500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | Chevrolet | K1500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | Chevrolet | K2500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | Chevrolet | K2500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | Chevrolet | P30 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | GMC | C1500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | GMC | C1500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | GMC | C2500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | GMC | C2500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | GMC | K1500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | GMC | K1500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | GMC | K2500 | 5.0L | V8 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1995 | GMC | K2500 | 4.3L | V6 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB135 for squeaking elimination. |
| 1995 | GMC | P3500 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1994 | Chevrolet | C1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | Chevrolet | C1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | Chevrolet | C2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | Chevrolet | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | Chevrolet | K1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | Chevrolet | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | Chevrolet | K2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | Chevrolet | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | Chevrolet | P30 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1994 | GMC | C1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | GMC | C1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | GMC | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | GMC | C2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | GMC | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | GMC | K1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | GMC | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1994 | GMC | K2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1994 | GMC | P3500 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1993 | Chevrolet | C1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | Chevrolet | C1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | Chevrolet | C2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | Chevrolet | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | Chevrolet | K1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | Chevrolet | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | Chevrolet | K2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | Chevrolet | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | Chevrolet | P30 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1993 | GMC | C1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | GMC | C1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | GMC | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | GMC | C2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | GMC | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | GMC | K1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | GMC | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1993 | GMC | K2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1993 | GMC | P3500 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1992 | Chevrolet | C1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | Chevrolet | C1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | Chevrolet | C2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | Chevrolet | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | Chevrolet | K1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | Chevrolet | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | Chevrolet | K2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | Chevrolet | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | Chevrolet | P30 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1992 | GMC | C1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | GMC | C1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | GMC | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | GMC | C2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | GMC | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | GMC | K1500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | GMC | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment and LB177 for hard pedal/noise. |
| 1992 | GMC | K2500 | 4.3L | V6 | N/A | Refer to LB179, LB177, and LB135 for correct release bearing/fork attachment, hard pedal/noise, and squeaking elimination. |
| 1992 | GMC | P3500 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1991 | Chevrolet | C1500 | 4.3L | V6 | N/A | From 02/01/1991 refer to LB179 for correct release bearing/fork attachment, LB177 for hard pedal/noise, and LB135 to eliminate squeaking. |
| 1991 | Chevrolet | C1500 | 5.0L | V8 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; Refer to LB177 regarding hard pedal/noise. |
| 1991 | Chevrolet | C2500 | 4.3L | V6 | N/A | From 02/01/1991 refer to LB179 for correct release bearing/fork attachment, LB177 for hard pedal/noise, and LB135 to eliminate squeaking. |
| 1991 | Chevrolet | C2500 | 5.0L | V8 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; Refer to LB177 regarding hard pedal/noise. |
| 1991 | Chevrolet | K1500 | 4.3L | V6 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; To eliminate squeaking, refer to LB135. |
| 1991 | Chevrolet | K1500 | 5.0L | V8 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; Refer to LB177 regarding hard pedal/noise. |
| 1991 | Chevrolet | K2500 | 4.3L | V6 | N/A | From 02/01/1991 refer to LB179 for correct release bearing/fork attachment, LB177 for hard pedal/noise, and LB135 to eliminate squeaking. |
| 1991 | Chevrolet | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment starting on 02/01/1991. |
| 1991 | Chevrolet | P30 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| 1991 | GMC | C1500 | 5.0L | V8 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; Refer to LB177 regarding hard pedal/noise. |
| 1991 | GMC | C1500 | 4.3L | V6 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; To eliminate squeaking, refer to LB135. |
| 1991 | GMC | C2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment starting on 02/01/1991. |
| 1991 | GMC | C2500 | 4.3L | V6 | N/A | From 02/01/1991; Refer to LB179 regarding correct release bearing/fork attachment.; To eliminate squeaking, refer to LB135. |
| 1991 | GMC | K1500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment starting on 02/01/1991. |
| 1991 | GMC | K1500 | 4.3L | V6 | N/A | From 02/01/1991 refer to LB179 for correct release bearing/fork attachment, LB177 for hard pedal/noise, and LB135 to eliminate squeaking. |
| 1991 | GMC | K2500 | 5.0L | V8 | N/A | Refer to LB179 for correct release bearing/fork attachment starting on 02/01/1991. |
| 1991 | GMC | K2500 | 4.3L | V6 | N/A | From 02/01/1991 refer to LB179 for correct release bearing/fork attachment, LB177 for hard pedal/noise, and LB135 to eliminate squeaking. |
| 1991 | GMC | P3500 | 4.3L | V6 | N/A | Refer to LB179 for appropriate release bearing/fork attachment for this Clutch Kit. |
| No rows match your filter. | ||||||
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AMS Automotive — 04-121Sachs — K70375-0104-081K061-6059901131104121123751756283029770NU1950