Archive for July, 2020

All-New 2021 Chevrolet Tahoe/Suburban and GMC Yukon/Yukon XL Have More Power, Capability, Content

All-New 2021 Chevrolet Tahoe/Suburban and GMC Yukon/Yukon XL Have More Power, Capability, Content

The all-new 2021 Chevrolet Tahoe and Suburban and 2021 GMC Yukon and Yukon XL are ready to live up to their legendary nameplates and segment leadership. The fully redesigned models […]

July 30, 2020
New 2021 Tahoe/Suburban and Yukon/Yukon XL Air Ride Adaptive Suspension

New 2021 Tahoe/Suburban and Yukon/Yukon XL Air Ride Adaptive Suspension

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 […]

July 30, 2020
2021 Tahoe/Suburban and Yukon/Yukon XL TAC Action Center

2021 Tahoe/Suburban and Yukon/Yukon XL TAC Action Center

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. […]

July 30, 2020
TPMS/RF Tool Software Update

TPMS/RF Tool Software Update

The latest software update for the EL-52545 TPMS/RF Tool (Fig. 18) is now available. The update adds the following features and enhancements: Trailer Tire Pressure Monitoring System (TPMS) learn and […]

July 30, 2020
1.2L Engine Oil Pan Installation

1.2L Engine Oil Pan Installation

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 […]

July 30, 2020
Warble Sound from Rear of Vehicle

Warble Sound from Rear of Vehicle

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 […]

July 30, 2020
Camshaft Position Actuator Valve Solenoid Bolt Replacement

Camshaft Position Actuator Valve Solenoid Bolt Replacement

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 […]

July 30, 2020
Exhaust Pipe Shaped to Avoid Low Contact

Exhaust Pipe Shaped to Avoid Low Contact

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 […]

July 30, 2020
Corvette Cooling System Draining and Filling Tips

Corvette Cooling System Draining and Filling Tips

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 […]

July 22, 2020
Spark CVT7 Transmission Replacement

Spark CVT7 Transmission Replacement

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 […]

July 22, 2020
Harmonic Balancer Sliding Back on Crankshaft

Harmonic Balancer Sliding Back on Crankshaft

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, […]

July 22, 2020
Servicing the Front Leveling System

Servicing the Front Leveling System

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 […]

July 22, 2020
Inspecting the Dipstick Tube O-Ring and Lower Oil Pan

Inspecting the Dipstick Tube O-Ring and Lower Oil Pan

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 […]

July 22, 2020
Check UBEC Bolts for Electrical Concerns

Check UBEC Bolts for Electrical Concerns

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 […]

July 22, 2020
Exhaust Brake Feel During Operation

Exhaust Brake Feel During Operation

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 […]

July 22, 2020
Loose Instrument Panel-to-Body Harness Connector

Loose Instrument Panel-to-Body Harness Connector

Some 2020 Encore GX and 2021 Trailblazer models may have several electrical conditions, including no audio from the radio, an inoperative power liftgate (RPO TC2), if equipped, and/or an inoperative […]

July 22, 2020