i have a 2004 4.8 silverado that shifts hard 1st to 2nd when driven for 20-30 minutes but when engine is turned off and cooled it will shift just fine

i have a 2004 4.8 silverado that shifts hard 1st to 2nd when driven for 20-30 minutes but when engine is turned off and cooled it will shift just fine 1 Answer

2004 Suburban 5.3L when the engine is cold or has been sitting for awhile and the vehicle is started there is a rattling sound not metal rattling but once the vehicle and fluidswarm up the noise stops 2 Answers

I have a 2004 Suburban 5.3L when the engine is cold or has been sitting for awhile and the vehicle is started there is a rattling sound that sounds like it is coming from under the passenger side ...

2007 Chevy Silverado Classic Brake Pedal goes to the floor when engine is running. 3 Answers

2007 Chevy Silverado Classic Brake Pedal goes to the floor when engine is running. I had a brake line blow, so i replaced all brake lines with pre-bent stainless steel lines. Slowly bled brakes. ...

I have a 2007 Silverado with the 4.8 liter. I have installed a spectre cold air intake. Recently I have noticed a considerable lag between the time I push on the pedal and the time my engine responds. 1 Answer

The engine has155000 miles on it. When it comes to the drive by wire systems I'm lost. Can y'all suggest a place to start?

Have a 07 classic silverado flex fuel turns off. Wait a few mins then turns off again. Yesterday didnt turn off once. I can almost feel when car is gonna turn off. Idles bad. 1 Answer

I heard it could be crank position sensor.