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Open Help Requests for GM
Help Request Answers
1990 Buick Regal 3.1L No Start
Please help with this older model vehicle-it was towed in due to cranks but no start-has fuel pressure & spark but no injector pulse.Snap On scanner showed rpm @ cranking to be 200=250 rpm.attempted ecm & ignition module replacement with no change.also replace...		 View
1994 Cadillac Seville 4.6L Poor Idle Quality
see related repair history Trouble codes: 27 (Throttle Switch Circut Failure).		 View
1997 Cadillac DeVille 4.6L battery
please help!!!My tech and i are going bald with this one.I have been scoping out fellow members input on related symptoms.(ed zandee) due to very similiar symptoms,pzm will not power down, data in pzm shows ign switch in acc. position with key off and removed....		 View
1994 Chevrolet G30 5.7L power steering pump
thank you in advance for all who can help!!! we have a 1994 C30 chevy van that has been converted into a motor home. van came in with a noisy power steering pump, the pump makes the same noise as it would if it had no fluid in it. it is important to mention t...		 View
1997 Chevrolet Cavalier 2.4L Hesitation, Stall, MIL Lamp on
This car has 2 concerns and I don't think they are related but I may be wrong. First it has a PO401A code for insufficient EGR flow I removed the egr valve and cleaned the passages but the light came back on after a short drive. The second problem is the car d...		 View
1998 Chevrolet C1500 5.7L No Start
This truck came in as a no start after hot soak. We scanned it no codes. Ran truck for an hour let it set for an hour and it would not start. Tested fuel pressure it is 65 psi while cranking. Had good spark while cranking but no injection pulse. Had ignition v...		 View
2001 Chevrolet Malibu 3.1L Upper Intake Manifold
Dear Sirs, This vehicle has a 3.1 L V6. I am resealing the upper and lower intake manifolds, to solve an external coolant leak. I resealed the lower intake, and reassembled. On reassembly, the upper intake manifold cracked at the (passengers side)left, rear bo...		 View
2003 Chevrolet Astro 4.3L alternator
i have a 2003 chevy astro with a no charging condition i have replaced 3 alternators in this van with no luck so i replaced it with an ac delco unit and still no luck we then replaced the pcm and still no luck i then wired the brown and gray wires from alterna...		 View
1997 Geo Metro 1.3L No Start, Cuts out
After replace ECU, car has spark & inj. signal just when 1st crank only,lost signal if continiously crank. Try old ECU back, no signal at all. Any suggestion, I really appreciate. Thanks a million.		 View
1995 GMC Jimmy 4.3L No Vent Up Hills
When going up hills,the AC only comes out the defroster.		 View
2001 Oldsmobile Aurora 3.5L compressor
Car came in not cooling well, we low side 60 high 200 and the low side would start comming up with rpm's. High side did not do much. Installed a new (GM) compressor flushed the system new accumulator and orfice device (2 stage electronic) and still have basica...		 View
1995 Pontiac Grand Prix 3.1L Cuts out
This car cuts out under load hot or cold. It doesn't matter what road speed is, but engine RPM is usually over 2000. The heavier the load, the sooner it cuts out. Fuel pressure is good at 40 lbs and doesn't drop. Making it run rich by disconnecting CTS has no ...		 View
2000 Pontiac Grand Am 2.4L Engine
I have a 2000 Pontiac Grand AM Auto trans with a 2.4L that needs the engine replaced. I also have access to a 1997 Oldsmobile Achieva with a 2.4L and Auto trans with a good engine. I have found that the specific Long blocks for the 2 vehicles have different pa...		 View

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac DeVille 4.6L engine
Thanks to everyone for the info. The torque specs were true but upon compleation a strange noise developed from the motor that got me worring. It turned out to be the alternator fins scraping the housing because the armature was loose and I suspect that that m...		 16
1968 Chevrolet Corvette CID wipers
Thanks to all that replied, the wiring diagram and info that I needed was best provided by Steve [...] and Ted(from Texas) all others were good info, but I was able to wire the wiper system without any problems with their input. Again thanks to all that took t...		 5
1991 Chevrolet Corvette 5.7L Hood
Hey guys the information that was supplied was enough to lead us to order the tool as per recommendation. I may be off the island before the tool get's here so the mechanics will do the actually opening of the hood. This is certainly a done deal.		 5
1999 Chevrolet K1500 Suburban 5.7L rear ac
Thanx to all who responded. The short answer to my question is yes you can disconnect the rear ac and have front ac only. There were two main ways of doing it. One was to replace the manifold lines with ones off a front only system. The other is to block off ...		 25
1999 Chevrolet Astro 4.3L Hesitation
Have to close as summary because customer declined repairs. I'm sure a MAF would have (completely) fixed the driveability problem for a few reasons. First, 4 out of 5 of you have seen these MAFs cause the symtptoms I described. Also got my hands on a heritage ... Trouble codes: P0463 (Fuel level), P0101 (maf).		 5
2000 Chevrolet Tahoe 5.3L heater core
sorry guys for not closing this but I was out of town. What I ended up doing was replacing the heater core and the vehicle was fixed. thanks to all really appreciated the responses. 		20
2000 Chevrolet Astro 4.3L engine cradl
We lost the job to another shop. I added some extra time to be safe and the insurance company did some shopping and found some one cheaper. Most thought it could be done in the alotted time. Thanks for all the great info. 		7
2001 Geo tracker 2.5L trans
This tracker is finally fixed! This thing has 3 output speed sensors, one that reads torque convertor,one that reads the output shaft and one on the t case to read final speed. My code was saying final output speed sensor low voltage so i was looking at the se...		 4
1996 GMC Savana 3500 5.7L Stall
I am going to call this fixed. It seems like the ignition coil was very intermittent causing it to run rough. It has been gone for two weeks and have not heard back from them. Jim		 8
2003 GMC suburban 5.3L computer,
well I have done a little more diag on this truck. Got some diagrams on the electric system from the fuse box. I pulled out the relay for the fuel pump and the fuse would not blow. I used my POWER PROBE and powered up the pump through the relay, within about ...		 10
2004 GMC C4500 6.6L Cuts out
THANKS IN ADVANCE FOR ALL THE TIPS I TRIED TO GET INFORMATION FROM GMC THEY WOULD NOT COOPERATE I MADE SURE ALL OIL PRESSURE SENSORS WERE WORKING COOLANT SENSORS WORKING I WAS RUNNING TRUCK WITH MY SCANNER PLUGGED IN AND I LOST THE DATA STREAM ,STARTED DOING A... Trouble codes: 0089 (fuel presure regulator).		 4
1999 Saturn SL2 1.9L front crank seal
Thank you for the replies. A new oil pump and dampener fixed the problem. Our thoughts were the pump had a high pressure leak into the seal area and the drain back hole wasn't large enough to handle the volume of oil. Oil pressure was within spec. The new damp...		 4
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