6 stories across all model years, newest first.
September 20, 2026
A GM-Trucks.com report raises an unverified question about later L86 bearings. GM’s federal recall documents establish defects in certain newer L87 engines, not an L86 connection.
Read story →September 18, 2026
GM engine quality was the issue I wanted to hear more about at its Flint event, beyond horsepower and torque. With questions about its previous V8 engines still hanging over the company, I wanted to…
Read story →September 17, 2026
The 350 and 400 are back. The new GM V8 engines, displacing 5.7 and 6.6 liters, will power the 2027 Chevrolet Silverado 1500 and GMC Sierra 1500, with the larger engine delivering 481 horsepower and…
Read story →August 14, 2026
General Motors has been dealing with torque converter shudder in its eight-speed automatic transmissions for years. Apparently, the problem has now happened often enough that it needs paperwork to bypass dealer discretion. The problem has…
Read story →June 30, 2026
When the new 2027 Chevrolet Silverado 1500 and GMC Sierra 1500 were revealed, much of the attention focused on next-generation V8 engines, redesigned interiors and nearly 60 inches of digital displays. One important powertrain, however,…
Read story →January 8, 2026
A recently filed patent details a new GM cylinder deactivation system that appears to be heading to the next-gen V8 engines coming in the 2027. This new GM cylinder deactivation system might replace the dynamic…
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