20 Most Recent 2008 GMC Envoy Denali - Page 9 Questions & Answers

it sound like the oil pressure sending unit is bad Had a 91 chevy do the same thing

If mileage is over 100K and plugs have not been changed, it is time. Could also be a bad coil pack or vacuum leak at intake manifold.

It take quite a bit of effort to release the shaft. Try harder.

It is definitely an air leak, could be the hoses or the bags. Needs to be troubleshot.

Can you see the smoke colored sensor near the windshield? I've had one break and fall down which caused this exact problem. If you can see it, pull the plastic trim piece off, make sure the connections are actually connected, have seen these come unhooked.

What codes did you have?

changing starter on a gmc s15 pick up truck

if crankshaft is damaged, engine will need to come out.. front diff assembly must be detached from the oil pan, and pan must be removed from engine to remove diff from chassis. it will give you access to main brgs to inspect for damage.

check the top runner on the tailgate on the outside to see if damaged. if not that then check the molds around the gate

there are several problems --- one is to check that there is power to the solenoid or relay to engage the starter . Check for good earth wire where it is on the engine /body. If you have power at the solenoid/relay on the wire from the ignition in the run position then it most likely will be a bad solenoid / relay

That stinks... Those engine are more involved. The coolant can leak from three different areas. The head gasket, the cylinder sleeves, and the front timing cover. If you drain the oil pan, drop down the rack and pinion unit and remove the oil pan. You can try pressure testing the coolant and see where the coolant is dripping from. Food for thought. These engines are known for valve issues in the head after 250K miles. The repair alone can be $3K or more. If I can be of anymore help , let me know.

Do you hear the pump come on briefly with key in run, not start? You should check fuel pressure-some parts stores rent a fuel pressure tester for small fee. Or try this: spray some starting fluid into the air intake when trying to start. If it starts and runs a few seconds, you know you have a fueling problem- pump or injectors or something with the fuel. Always check for trouble codes with a no start. If checking for spark and have no spark to the plugs, then it could be the crank position sensor. That sensor is crucial for the computer to figure spark timing. But if no spark, it could be other things as well, like the cam position sensor, ignition control module, or a problem in the circuits for all these. The crank sensor is just an educated guess for no spark-not a certainty. Since it won't run, you can't go to have the computer scanned for free at a parts store-do you have any friends or relatives with an OBD-2 hand held scanner? Just to check for any trouble codes, but do check for fuel and spark.

It sounds like it might be as cheap as replacing a fuse or fuses. Have you checked your fuses to see if any of them are blown? Refer to your owner's manual for fuse box location. Fuses can easily be checked with a test light or voltmeter/ohmmeter.