You need to check to see if it has spark at a spark plug , pull a plug wire an put a screw drive in the end an hold close to ground , metal on the engine ! Have someone crank over the engine , does it have spark ? Yes or no ? If it does spray some carburetor cleaner into the throttle plate an see if it tries to start , if it does you have a fuel delivery problem ! If you have no spark there are a few thing's that could be wrong , coil , ignition module , crankshaft position sensor . That is some basic test's to do , then you'll need to trouble electrical circuits with a volt meter , if your not sure on how to do this you may want to take to ASE certified technician !
SOURCE: low oil when engine warms up gmc sierra 1995
30-40 psi of oil pressure is fine for many vehicles including your GMC. I am assuming that the truck has more than 100,000 miles on it and still has the original engine in it. By rule of thumb you only need 10 psi per 1000 rpms in a typical street driven engine to give adequate oil pressure to keep the bearings from oil starvation. The oil pressure is typically higher when initial start up occurs because it is more viscous due to the temperature of the oil as the engines oil warms up the visconsity thins out and the oil flows more smoothly. The drop in oil pressure is a normal occurance. Above 45 is more than required for a daily driven street engine. I believe that the specs on that engine only list 30- 45 psi.
SOURCE: GMC Sierra A/C Stops Cooling After Driving a Few Minutes
It sounds like you either have an condensor fan problem or low freon. The condensor fan is near the radiator. In some cases the radiator fan doubles as the condensor fan. So look there too.
SOURCE: 96 gmc sierra hard to crank after 12-14 hours
that has a votec engine in it the fuel pressure is droping at knight and it takes 60 psi before the injectors will fire most likely cause fuel pump ,leaking injector ,or a feul pressure regulator
167 views
Usually answered in minutes!
×