Denso 5029 Spark Plug

Denso 5029 U-Groove Spark Plug

Denso 5029 is a conventional spark plug built for older GM and Chevrolet applications that call for a tapered-seat, 14 mm plug with a 16 mm hex. Its U-Groove ground electrode design is engineered to improve ignitability, helping support more complete combustion and steadier engine efficiency in compatible engines.

• U-Groove ground electrode tip design for improved spark exposure
• 5000 ohm resistor for ignition noise suppression
• Copper center electrode core with nickel tip material
• Nickel ground electrode core material
• Pre-gapped to 0.9 mm
• Tapered seat, 14.00 mm thread diameter, 11.60 mm reach
• Manufacturer heat range 16

U-Groove Conventional Line Details

The Denso U-Groove Conventional line focuses on dependable ignition performance in standard replacement applications. For vehicles such as Chevrolet C10, Camaro, Corvette, and GMC Jimmy, this spark plug provides an OE-style service part option where the original engine specification calls for a conventional nickel-and-copper design. Denso 5029 also cross-references Denso Auto Parts T16R-U for the same application.

Fitment Coverage

• Fits 1975-1991 Chevrolet P30, N/A
• Fits 1979-1990 GMC P3500, N/A
• Fits 1975-1989 Chevrolet P20, N/A
• Fits 1989 Chevrolet V3500, N/A
• Fits 1989 GMC P2500, N/A
• Fits 1979-1987 GMC P2500, N/A
• Fits 1987-1989 GMC R3500, N/A
• Fits 1987-1989 GMC V3500, N/A
• Fits 1987-1988 Chevrolet R20, N/A
• Fits 1987-1988 Chevrolet R30, N/A
• Fits 1987-1988 Chevrolet V30, N/A
• Fits 1987-1988 GMC R2500, N/A
• Fits 1987 Chevrolet V20, N/A
• Fits 1987 GMC V2500, N/A
• Fits 1986 Chevrolet C10, N/A
• Fits 1975-1980 Chevrolet C10, N/A
• Fits 1980-1986 Chevrolet C20, N/A
• Fits 1975-1978 Chevrolet C20, N/A
• Fits 1968-1986 Chevrolet C20 Suburban, N/A
• Fits 1975-1986 Chevrolet C30, N/A
• Fits 1975-1986 Chevrolet K20, N/A
• Fits 1977-1986 Chevrolet K30, N/A
• Fits 1980-1986 GMC C2500, N/A
• Fits 1979-1986 GMC C2500 Suburban, N/A
• Fits 1979-1986 GMC C3500, N/A
• Fits 1979-1986 GMC K2500, N/A
• Fits 1979-1986 GMC K3500, N/A
• Fits 1985 Chevrolet G30, N/A
• Fits 1975-1979 Chevrolet G30, N/A
• Fits 1985 Chevrolet K20 Suburban, N/A
• Fits 1968-1982 Chevrolet K20 Suburban, N/A
• Fits 1984 GMC G3500, N/A
• Fits 1984 GMC K2500 Suburban, N/A
• Fits 1979-1982 GMC K2500 Suburban, N/A
• Fits 1980 Chevrolet K10, N/A
• Fits 1975-1976 Chevrolet K10, N/A
• Fits 1975-1980 Chevrolet P10, N/A
• Fits 1979-1980 GMC C1500, N/A
• Fits 1980 GMC K1500, N/A
• Fits 1979-1980 GMC P1500, N/A
• Fits 1975-1978 Chevrolet G20, N/A
• Fits 1975-1978 GMC G25, N/A
• Fits 1975-1978 GMC G35, N/A
• Fits 1975-1976 GMC G15, N/A
• Fits 1972-1976 GMC Jimmy, N/A
• Fits 1970 GMC Jimmy, N/A
• Fits 1972-1975 Chevrolet Bel Air, N/A
• Fits 1970 Chevrolet Bel Air, N/A
• Fits 1968-1975 Chevrolet C10 Suburban, N/A
• Fits 1972-1975 Chevrolet Camaro, N/A
• Fits 1970 Chevrolet Camaro, N/A
• Fits 1972-1975 Chevrolet Caprice, N/A
• Fits 1970 Chevrolet Caprice, N/A
• Fits 1972-1975 Chevrolet Corvette, N/A
• Fits 1972-1975 Chevrolet El Camino, N/A
• Fits 1975 Chevrolet G10, N/A
• Fits 1972-1975 Chevrolet Impala, N/A
• Fits 1970 Chevrolet Impala, N/A
• Fits 1971-1975 Chevrolet K10 Suburban, N/A
• Fits 1975 Chevrolet K5 Blazer, N/A
• Fits 1973-1975 Chevrolet Malibu, N/A
• Fits 1972-1975 Chevrolet Monte Carlo, N/A
• Fits 1970 Chevrolet Monte Carlo, N/A
• Fits 1972-1975 Chevrolet Nova, N/A
• Fits 1970 Chevrolet Nova, N/A
• Fits 1975 Oldsmobile Cutlass Supreme, N/A
• Fits 1970-1974 Chevrolet Blazer, N/A
• Fits 1972-1974 GMC G15/G1500 Van, N/A
• Fits 1970 GMC G15/G1500 Van, N/A
• Fits 1972-1974 GMC G25/G2500 Van, N/A
• Fits 1970 GMC G25/G2500 Van, N/A
• Fits 1972-1974 GMC G35/G3500 Van, N/A

Common Issues This Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle in older Chevrolet and GMC engines
• Misfire complaints from weak ignition spark
• Reduced combustion efficiency from aged secondary ignition components
• Service replacement needs for tapered-seat GM applications

Installation Notes

Verify the engine calls for a 14.00 mm thread diameter, 11.60 mm reach, tapered seat, and 16 mm hex before installation. Confirm the specified heat range and gap requirement for the engine application, then inspect plug wires, distributor components, and coil output during service. This part is listed for compatible Chevrolet C10, Camaro, Corvette, GMC Jimmy, and other GM truck and van applications shown in the fitment data.

Quality Assurance

Denso manufactures this spark plug as part of its U-Groove Conventional line, using a copper core with nickel electrode materials and a 5000 ohm resistor for stable ignition service in the listed applications. Part number 5029 is built to the published specifications and fitment coverage for the vehicles shown above.