GM Repair Problems? Ask GM Repair Expert Now.
If the engine is turning over but not starting, there are a couple of things to check. First, check for spark. While turning the engine over, remove a spark plug wire and see if there is spark jumping from the wire to the plug. If there is no spark, remove the wire from the ignition coil while cranking the engine. If there is no spark leaving the coil, the problem may be the ignition control module. Inspect the electrical connector and wire harness to the module for any loose, broken or damaged wires. If the visual inspectiopn checks ok, replace the ICM.
If there is spark, then fuel pressure will need to be tested. With the key on and engine off, the fuel pressure should be between 56-62 psi. If the fuel pressure is not within specs, check the filter and make sure it is not clogged. If the fuel filter is good, the fuel pump will need to be replaced.
If you found this answer helpful, please help me by leaving a rating using the "stars" at the top of the page or click 'accept'.Rating or accepting my answer does not cost you extra. It allows me to be credited for this Q&A.