20 Most Recent 2003 GMC Envoy Xl - Page 8 Questions & Answers

Need to take off the steering wheel and check the contacts and for good ground. Some people have had a broken piece of plastic stuck between the contacts.

the crankshaft sensor should be located on the GM V6 engine right behind the bottom
pulley at the bottom. There was a service bulletin for check engine lights on my S-10 about a
clearance problem with the sensor. Check it to make sure the end hasn't got
a hole worn in it. Hope this helps.

Under the dash on the drivers side.To the left of the steering wheel.Should be directly on the edge of the dash panel.Hope this helps.Good luck.

Hi and welcome to FixYa!
Two reasons why it vibrates. You may have a faulty MAF (mass air flow) sensor or IACV (idle air control valve). These two controls the air that circulates in the engine. If one of them is faulty you'll definitely have vacuum irregularities, car may run sluggish or may even result to stalling.

These two sensors are located on the throttle body, once replaced you'll be good.

Hope this helps and thank you for using FixYa! Have a good one!

lock solenoid has gone bad needs to be replaced

Check your owner's manual for a fuse box diagram and check the appropriate fuses. This may also be a high amp fuse that is in the fuse box under the hood. Please rate this answer, thanks.

Sure sounds like a slipping transmission to me. When is the last time you changed the transmission fluid? Before you go dumping $2,600 for a new transmission, I'd do a transmission fluid change first. If you do change the fluid, use Dextron 6, it's GM's new transmission fluid, much better than the fluid you have now. Not to scare you, but my transmission went out at about 100k miles, so you're doing good if it hasn't been rebuilt yet.

Clean your throttle body with throttle body cleaner, must be nice and shiny. Do this with the battery disconnected. When finished, hook the battery back up and drive around for 20 minutes or so, so the computer can relearn the newly cleaned TB. Your computer learned some bad habits with the dirty throttle body, so when you disconnected the battery, it thought the throttle body was clean, therefore, you'll get performance problems. Especially when the defrost or A/C is on.

alternater over chargeing neededs replaced

It is worn out then. the only solution is to replace it

first i would make sure that you have at least 10 volts at the little wire on the starter. if it is turning over you would need to check for fuel pressure, fire out of the coils and injector signal at the injectors. fuel pumps are a common problem.

Remove the alternator, drain radiator, remove the drivers side tire to gain access.

This is a real tough question. The ride control on these covers many different sensors. It could be something very simple and easy to fix. But it could be one of the struts. It is impossible to tell what is going on without a diagnosis. I would suggest taking the truck to Autozone or Advanced Auto Parts and have them run a diagnostics. This will tell you what sensor is needing replaced. Or what is making the light come on. Most of the time on a vehicle this new, it is something very minor. More than likely not anything real expensive to fix. Probably a $20-$30 sensor.

Sounds like your air ride is malfunctioning could be a defect in bag,line, or sensor or possibly more the ecm should fire out a code if you have a code reader

I take it you have the I6 engine? Use AC Delco 41-103's for the spark plugs, these engines love these plugs. Other brands MAY cause the engine not to idle nice and smooth. Clean your throttle body with throttle body cleaner, with the battery disconnected, needs to be nice and shiny. Change the 02 sensor upstream right next to the exhaust manifold, that's the easy one to change. Also, replace the fuel filter and air filter. And of course, change your oil, Mobil 1 synthetic is the best for these. Check all your fluids also, like differential, tranny, xfer case and so on. If you do change the fluid in your tranny, use GM's new Dextron 6, will shift better and make your transmission last longer.

Hello Dean.
Where on the vehicle is this noise coming from? I know it may not be easy to do as noises travel easily through the vehicles body, but I will need any help you can offer to help you.
The metal noise could be u joints, cv joints, differential bearings, transfer case.
There is a bulletin on the transfer case. here it is.

TECHNICAL
Bulletin No.: 08-04-21-001B
Date: August 25, 2008
Subject:
NVG 126/226 Transfer Case Grating/Grinding Noise When 4WD is Engaged, Service 4WD Lamp On, DTC C0327 Set (Replace Clutch Pressure Plate Bearing Assembly and Clutch Lever) Models:
2004-2007 Buick Rainier
2002-2008 Chevrolet TrailBlazer Models
2002-2008 GMC Envoy Models
2002-2004 Oldsmobile Bravada
2005-2008 Saab 9-7X with Four-Wheel Drive or All-Wheel Drive and Active All-Wheel Drive (RPO NP4) or Active Two-Speed (NP8) Transfer Case
Built Prior to September 18, 2007 (NVG 126) or September 21, 2007 (NVG 226) Supercede:
This bulletin is being revised to update the correction information to include a procedure to reindex the transfer case encoder motor (actuator). This procedure is being provided to help reduce unnecessary warranty expenses. Please discard Corporate Bulletin Number 08-04-21-001A (Section 04 - Transmission/Transaxle).
Condition
Some customers may comment on a grinding type noise in the transfer case when 4WD is engaged in either AUTO or 4WD mode. This noise may also be accompanied by the SERVICE 4WD lamp being illuminated and DTC C0327 set.
This condition is more prevalent on vehicles where 4WD is continuously used.
Cause
This noise may be caused by a faulty clutch pressure plate bearing.

A more robust clutch pressure plate bearing, inner plate and clutch lever has been released for service. Replace the clutch pressure plate bearing, inner plate and clutch lever. Refer to the Transfer Case Disassemble and Transfer Case Assemble procedures in SI. Former and new parts should not be intermixed during transfer case overhaul and they are to be used in sets only.
DO NOT replace the transfer case assembly unless extensive internal damage has occurred.
Important: When the clutch pressure plate bearing fails, it causes the clutch lever to over-travel, allowing the transfer case encoder motor (actuator) to rotate to an invalid position. Engineering has developed a tool and procedure to reindex the transfer case encoder motor (actuator) so it can be reused.



There is more to the bulletin but this gives you an idea of a possibility of the noise.

Also when in 4WD and when the road surface is hard with good traction it is normal to feel the binding. Especially when you are turning. The reason for this is all the wheels do not necessarily turn at the same speed or distance and the drivetrain will "wind up" crating pressure in the driveline.
The use of 4 wheel drive should be used only on surfaces where the tires can 'slip" allowing the binding to release.

There you are, I hope it helps you towards a repair.
Thank you for using FixYa.
KL

If you can lower the actuators without damaging them, it should work. The ride height should drop the same amount that the actuators are lowered. Don't go too low or you will bottom out the air shocks.

A4wd means it senses wheel slipping automatically and engages 4 wheel drive as needed, use that.