You need a timing light to set the correct timing. Once the truck has been set at base timing at 0-2 degrees by disconnecting the timing wire and setting the dist., the computer adjusts the timing by itself to the proper setting.. There is not an adjustment for the the idle speed on this truck.
I do believe it is on the bottom of the timing chain cover.
Timing for 1990 1500 with 4.3
The timing is set on a 98 Chevy Silverado 1500 5.7L by aligning the cam sprocket with the timing chain markings. The engine's computer will then make adjustments on the fly for any additional timing changes needed.
No there is not.
190hp
Where does the vacuum line lead to from the top of an 2002 Chevy express 1500 van with 5 liter engine
No, that is a chain engine.
That will be a 4L60E transmission.
Computer controlled and not adjustable
Probably computer controlled and not adjustable
That requires an engine scanner.
Zero at TOP DEAD CENTER / TDC.