The Air Ride Adaptive Suspension available on the redesigned 2021 Tahoe/Suburban and Yukon/Yukon XL is an automatic level control suspension with a variable rate spring design. (Fig. 11) Fig. 11 […]

The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2021 GMC Yukon and Yukon XL (Fig. 16) and 2021 Chevrolet Tahoe and Suburban. […]

Proper installation of the engine oil pan on the 2020 Encore GX and 2021 Trailblazer equipped with the 1.2L engine (RPO LIH) requires that the room temperature vulcanizing (RTV) sealant […]

Some 2014-2019 Corvette models equipped with the 6.2L V8 engine (RPO LT1) and 8L90 automatic transmission (RPO M5U) may have a warble-type sound coming from the rear of the vehicle […]

Owners of some 2020 Encore GX and 2021 Trailblazer models equipped with the 1.3L engine (RPOT L3T) may notice an unstable engine RPM at idle and an illuminated Check Engine […]

A quick look at the exhaust pipe crossover section on 2019-2020 Silverado and Sierra models equipped with a V6 or V8 engine shows that it is not a completely round […]

The cooling system of the 6.2L V8 engine (RPO LT2) on the 2020 Corvette (Fig. 1) is designed to help maintain engine performance under extreme track environments. When filling the […]

Several DTCs may set after replacing the CVT7 transmission (RPO M4M) in some 2014-2015 Spark models. (Fig. 8) The most common codes that may set are P0797 (Pressure Control Solenoid […]

A belt chirp sound or metal-to-metal sound may be heard on some 2019-2020 Silverado HD, Sierra, HD and Silverado 4500HD/5500HD/6500HD models equipped with the 6.6L Duramax diesel engine (RPO L5P, […]

There may be a Service Front Leveling System message displayed on the Driver Information Center on some 2020 Corvette models. DTC U3000 SYM49 (Control Module Internal Malfunction) also may be […]

When diagnosing engine oil leaks on 2019-2020 Silverado, Sierra; and 2020 CT4-V models equipped with the 2.7L turbocharged 4-cylinder engine (RPO L3B) (Fig. 16), inspect the dipstick tube O-ring and […]

Some 2019-2020 Silverado and Sierra models may have any of several electrical-related concerns, including no crank, starter engages after engine start, flickering headlamps, erratic instrument cluster gauges, or high or […]

The enhanced exhaust brake is one of several improvements in 2020 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P). The exhaust brake feature can be […]