GMC C35/C3500 Pickup service by top-rated mechanics at the convenience of your home or office

Hello. If the RPMs drop off right as the engine is stalling then the most common cause of this is a bad crankshaft position sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor). This sensor tells the engine computer (https://www.yourmechanic.com/article/what-is-a-vehicle-s-electrical-control-unit) what the engine RPM speed is and...

Hi Tyler. Thanks for sending in your question tonight. Assuming your AC is turned off, this type of problem can occur due to a few different issues. The most common reason is that the idle control valve is sticking or...

Hello, the 4L60 does not have a vacuum hose, it uses a throttle cable that connects to the throttle body .The 4L60 also needs a torque convertor clutch electrical signal. A turbo 350 uses a vacuum hose.

There is a common issue among vehicles of this year model with the throttle position sensors (https://www.yourmechanic.com/services/throttle-position-sensor-replacement) on the throttle bodies. The reduced engine power warning may have also illuminated the Check Engine Light (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) and stored a faults code....