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Pioneer Cables 621043 Automatic Transmission Mount
| Brand | Pioneer Cables 621043 |
|---|---|
| Fits | Chevrolet, GMC, Isuzu, and Oldsmobile · 170 vehicles |
Premium replacement solution. Engineered for a hassle-free installation.
Sure-Fit System. Application testing helps ensure proper fit and function.
Durable housing. Made from high-grade metal or pure aluminum.
Cross-references Anchor 2839 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Automatic Transmission Mount for HD Trucks and SUVs
Pioneer Cables 621043 is an automatic transmission mount built for direct replacement on a wide range of Chevrolet, GMC, Oldsmobile, and Isuzu applications. It is engineered for vehicles such as the Chevrolet Silverado 2500 HD, GMC Sierra 2500 HD, and Chevrolet Astro, with fitment spanning 1994-2010 model years.
Key Features
- Automatic transmission mount for transmission-to-crossmember support
- Sure-Fit System application testing for vehicle-specific installation accuracy
- High-grade metal housing with corrosion-resistant coating or pure aluminum construction, depending on application
- Blended rubber compound matched to the specific vehicle application for vibration absorption
- Seamless hydraulic fill and electronic control where specified by the application
- Cross-reference: Anchor 2839
Detailed Description
This Pioneer Cables transmission mount, part number 621043, is a premium replacement for worn or damaged automatic transmission mounts on trucks, vans, and SUVs. It is designed for direct replacement use on models including Chevrolet Silverado 2500 HD, GMC Sierra 3500, Chevrolet Blazer, GMC Jimmy, and Chevrolet S10, with application-specific notes for certain vehicles that mount on the transmission crossmember and connect to the transmission mount bracket. The mount uses a durable housing and a bonded rubber isolator to help control drivetrain movement and reduce vibration transfer.
Compatible With: 2006-2010 Chevrolet Silverado 2500 HD; 2001-2010 GMC Sierra 2500 HD; 2007-2010 GMC Sierra 3500 HD; 2007 GMC Sierra 2500 HD Classic; 2006 Chevrolet Avalanche 2500; 2001-2006 Chevrolet Suburban 2500; 2001-2006 GMC Yukon XL 2500; 1996-2005 Chevrolet Astro; 2002-2005 Chevrolet Avalanche 2500; 1995-2005 Chevrolet Blazer; 2001-2005 Chevrolet Silverado 2500 HD; 2001-2005 Chevrolet Silverado 3500; 1995-2005 GMC Jimmy; 1996-2005 GMC Safari; 2002-2005 GMC Sierra 3500; 1994-2004 Chevrolet S10; 1994-2004 GMC Sonoma; 2001-2002 Chevrolet Silverado 2500 HD w/MT1; 1996-2001 Oldsmobile Bravada; 1998-2000 Isuzu Hombre; 1998 Chevrolet K1500; 1998 GMC K1500.
What It Helps Fix
- Excess drivetrain vibration felt through the cabin
- Clunking or shifting movement from a deteriorated transmission mount
- Transmission support issues caused by cracked or separated rubber
- Noise transfer from a worn mount housing or isolator
- Improper transmission positioning at the crossmember
Installation Notes and Tips
Verify the vehicle’s year, make, model, and any listed notes before installation. Some applications are located on the transmission crossmember and connect to the transmission mount bracket, so confirm the mounting location against the original part. Compare the existing mount to the replacement and inspect the crossmember and bracket for wear or damage before installation.
Quality Assurance
Pioneer Mounts are built using application-specific testing through the Sure-Fit System and are manufactured with durable housing materials and bonded rubber designed for the listed vehicle applications. Part number 621043 is a direct replacement solution for the confirmed fitment range.
| Year | Make | Model | Submodel | Drive Type | Transmission | Liters | Cylinders | Fuel Type | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 2010 | Chevrolet | Silverado 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2010 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2010 | GMC | Sierra 3500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2009 | Chevrolet | Silverado 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2009 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2009 | GMC | Sierra 3500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2008 | Chevrolet | Silverado 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2008 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2008 | GMC | Sierra 3500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2007 | Chevrolet | Silverado 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2007 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2007 | GMC | Sierra 2500 HD Classic | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2007 | GMC | Sierra 3500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2006 | Chevrolet | Avalanche 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2006 | Chevrolet | Silverado 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2006 | Chevrolet | Suburban 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2006 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2006 | GMC | Yukon XL 2500 | SLT | RWD | — | 8.1L | V8 | GAS | — |
| 2005 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2005 | Chevrolet | Avalanche 2500 | — | — | Automatic | 8.1L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2005 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2005 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2005 | Chevrolet | Silverado 2500 HD | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2005 | Chevrolet | Silverado 3500 | — | RWD | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2005 | Chevrolet | Suburban 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2005 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2005 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2005 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2005 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2005 | GMC | Sierra 3500 | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2005 | GMC | Yukon XL 2500 | SLT | RWD | — | 8.1L | V8 | GAS | — |
| 2004 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2004 | Chevrolet | Avalanche 2500 | — | — | Automatic | 8.1L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2004 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2004 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2004 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2004 | Chevrolet | Silverado 2500 HD | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2004 | Chevrolet | Silverado 3500 | — | RWD | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2004 | Chevrolet | Suburban 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2004 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2004 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2004 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2004 | GMC | Sierra 3500 | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2004 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2004 | GMC | Yukon XL 2500 | SLT | RWD | — | 8.1L | V8 | GAS | — |
| 2003 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2003 | Chevrolet | Avalanche 2500 | — | — | Automatic | 8.1L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2003 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2003 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2003 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2003 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2003 | Chevrolet | Silverado 2500 HD | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2003 | Chevrolet | Silverado 3500 | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2003 | Chevrolet | Suburban 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2003 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2003 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2003 | GMC | Sierra 2500 HD | WT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2003 | GMC | Sierra 3500 | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2003 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2003 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2003 | GMC | Yukon XL 2500 | SLT | RWD | — | 8.1L | V8 | GAS | — |
| 2002 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2002 | Chevrolet | Avalanche 2500 | — | — | Automatic | 8.1L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2002 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2002 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2002 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2002 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2002 | Chevrolet | Silverado 2500 HD | — | RWD | Automatic | 6.6L | V8 | — | w/MT1; Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2002 | Chevrolet | Silverado 2500 HD | — | RWD | Manual | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2002 | Chevrolet | Silverado 3500 | — | RWD | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2002 | Chevrolet | Suburban 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2002 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2002 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2002 | GMC | Sierra 2500 HD | SLT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2002 | GMC | Sierra 3500 | — | — | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2002 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2002 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2002 | GMC | Yukon XL 2500 | SLT | RWD | — | 8.1L | V8 | GAS | — |
| 2001 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2001 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2001 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2001 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2001 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2001 | Chevrolet | Silverado 2500 HD | — | RWD | Automatic | 6.6L | V8 | — | w/MT1; Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2001 | Chevrolet | Silverado 2500 HD | — | RWD | Manual | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2001 | Chevrolet | Silverado 3500 | — | RWD | Automatic | 6.6L | V8 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 2001 | Chevrolet | Suburban 2500 | LT | 4WD | — | 8.1L | V8 | GAS | — |
| 2001 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2001 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2001 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2001 | GMC | Sierra 2500 HD | SLT | RWD | — | 6.6L | V8 | DIESEL | — |
| 2001 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2001 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2001 | GMC | Yukon XL 2500 | SLT | RWD | — | 8.1L | V8 | GAS | — |
| 2001 | Oldsmobile | Bravada | — | — | Automatic | 4.3L | V6 | — | — |
| 2000 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2000 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2000 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2000 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2000 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2000 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2000 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2000 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 2000 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2000 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2000 | Isuzu | Hombre | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 2000 | Isuzu | Hombre | — | 4WD | Manual | 4.3L | V6 | — | — |
| 2000 | Oldsmobile | Bravada | — | — | Automatic | 4.3L | V6 | — | — |
| 1999 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1999 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1999 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1999 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1999 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1999 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1999 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1999 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1999 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1999 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1999 | Isuzu | Hombre | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1999 | Isuzu | Hombre | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1999 | Oldsmobile | Bravada | — | — | Automatic | 4.3L | V6 | — | — |
| 1998 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1998 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1998 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1998 | Chevrolet | K1500 | — | — | Manual | 4.3L | V6 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 1998 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1998 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1998 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1998 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1998 | GMC | K1500 | — | — | Manual | 4.3L | V6 | — | Located On Transmission Crossmember, Connected To Transmission Mount Bracket |
| 1998 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1998 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1998 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1998 | Isuzu | Hombre | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1998 | Isuzu | Hombre | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1998 | Oldsmobile | Bravada | — | — | Automatic | 4.3L | V6 | — | — |
| 1997 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1997 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1997 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1997 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1997 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1997 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1997 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1997 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1997 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1997 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1997 | Oldsmobile | Bravada | — | — | Automatic | 4.3L | V6 | — | — |
| 1996 | Chevrolet | Astro | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1996 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1996 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1996 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1996 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1996 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1996 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1996 | GMC | Safari | — | AWD | Automatic | 4.3L | V6 | — | — |
| 1996 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1996 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1996 | Oldsmobile | Bravada | — | — | Automatic | 4.3L | V6 | — | — |
| 1995 | Chevrolet | Blazer | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1995 | Chevrolet | Blazer | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1995 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1995 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1995 | GMC | Jimmy | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1995 | GMC | Jimmy | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1995 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1995 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1994 | Chevrolet | S10 | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1994 | Chevrolet | S10 | — | 4WD | Manual | 4.3L | V6 | — | — |
| 1994 | GMC | Sonoma | — | 4WD | Automatic | 4.3L | V6 | — | — |
| 1994 | GMC | Sonoma | — | 4WD | Manual | 4.3L | V6 | — | — |
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