General Motors’ Active Fuel Management system has been around long enough to earn both fans and vocal critics, and that split has created a simple but urgent question for buyers: which GM engines ...

QUESTIONI'm in the process of transplanting an L77 from a 2012 Caprice 9C1 PPV [police pursuit vehicle] along with its 6L80E [six-speed, longitudinally mounted electronic automatic overdrive ...

We may receive a commission on purchases made from links. Imagine you could get all the brawny output of a robust V8 engine in your truck when needed, but also get improved fuel efficiency while ...

General Motors's Active Fuel Management (AFM) technology utilizes hydraulic valves, solenoids, and advanced software to shut down half of the cylinders in a V8 or V6 engine to save fuel. The system ...

I have found that the collapsed lifter situation rarely makes any noise. In my case cylinder #6 just stopped working and the pushrod bent falling out of the lifters way. We stoipped the engine almost ...

More info on the Dealer’s repair pursuant to SB N212353840 which states all 16 lifters must be replaced. After connecting with the Dealer’s General Manager (GM), the Service Manager went back to the ...

The Chevy Silverado has been one of America's best-selling half-ton pickups for decades, but not every model year has earned that reputation through reliability. Every truck has its bad years, but the ...

VVT Cam Swap: Fear VVT and AFM no more! Swapping cams on an L99 is easy and good for tons of power OK, so you checked off the option box for the 6L80E automatic when ordering up your new fifth-gen.

The biggest difference between L86s and L87s is that L86s have occasional complaints and 28,000 L87 failures happened before GM recalled 600,000 trucks in the U.S. alone. The 2014-2018 L86 and ...