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Professional Automotive Repair Technical Discussions for March 24, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1991 Buick Riviera Luxury 3.8L oil pump VIN: 1G4EZ13C4L Hello fellows tech. Here I am again. I have this 91 Rivers with no oil pressure, I drop the oil pan thinking the screen may be clog with sludge but it was clean. Remove the oil filter housing to check pressure regulator, it didn't seem to be stuck open. the on... |
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| 1999 Buick Regal GS 3.8L Surge VIN: 2G4WF521XX vehical surges on slight acceleration,engine has to be at opertating temp. for some reason it will only surge while A/T is in 3rd or OD with lock up converter engaged, cant duplicate in 1st or 2nd even if held their manualy. thinking it may be a lockup convert... |
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| 1992 Chevrolet C2500 Cheyenne 5.7L crank bearings VIN: 2GCFC29K5N Hello everyone. This truck has scored crank bearings & rod knock. Even though the engine is 151,000 miles old I suspect that the dreaded abrasive cleaning disc residue may have been the culprit that pushed this engine over the edge. What I want to know is - ho... |
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| 1993 Chevrolet Lumina APV 3.1L Stall VIN: 1GNDU06D6P This van originally had a miss in it. We replace wires and plugs and it was corrected. Then customer complained about that the vehicle was starting hard and progressed to starting but stopping and took several attempts to get it to keep running but once runnin... |
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| 1994 Chevrolet C3500 6.5L Poor Idle Quality VIN: 1GBKC34F4F This is for you G.M. techs. I have replaced the electric and electronic fuel pumps on this truck. It drives fine, the problem is on cold start it will die 3 or 4 times and then idle low RPM. The problem seems to be the engine coolant temp sensor. When it is un... |
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| 1995 Chevrolet C1500 4.3L Poor Idle Quality, Stall, TAIL LIGHTS VIN: 1GCEC14Z45 I've pulled the wiring from the fuel pump and tail lights out up until the fuse box. No corrosion, breakage, or rust. All fuses and powers seem to be good to fuel pump, until the tail lights are turned on or the brake lights are applied. Then the voltage at th... |
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| 1996 Chevrolet K1500 5.7L Cuts out VIN: 1GCEK14R7T Shortly after installing a rebuilt engine in this truck we have had a problem with a blip, temp .5 sec loss of power. It is like the ignition shuts down but it doesn't. We have confirmed this with a lab scope while this occurs. It happens at 50 to 65 mph after... |
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| 1996 Chevrolet Express 1500 5.7L jerk on re-accell. VIN: 1GBFG15R5T Hi fellow techs, I have a 4L60E trans that when throttle is let up slightly then reapplied, there is a 2 second delay then a soft to solid jerk occurs. This happens almost every time and was told by tranny shop that problem was in valve body. Was also told to ... |
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| 1996 Chevrolet K1500 5.7L brake system VIN: 2GTEK19R2T gentlemen, this vehicle has had a problem with poor stopping ability at high speed braking, as long as my customer has owned it. it has larger than normal tires on it {35 x 12.5's} he was sold an aftermarket brake conversion kit to change over the drum brakes... |
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| 1997 Chevrolet C2500 5.7L backfires on accel VIN: 1GCGK24RXV This truck back fires under load only when hot. Also,upon acceleration the upper intake where the fuel lines and injector harness plugs in it seems to rise while accelerating...is this normal? |
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| 1997 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality, Misfire VIN: 2G1WX12XXV car towed in, no start, inspect for broken timing belt, found belt to be loose and tentioner broken. replaced tensioner, 2 idler and 1 tensioner pulleys, and belt using the special tools to set cams. plugs and wires were replaced at this time also. engine star... Trouble codes: P0300 (multiple misfire detected) |
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| 2001 Chevrolet Impala LS 3.8L battery light. day drivind lights.back-up lights a VIN: 2G1WH55KX1 i think possible pcm or bcm problem but have replaced either one. i have tried tap test but no change in lights with the key off battery light does flicker only wiyh key on. i will take any help i can get. thanks mac [...] |
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| 1995 Geo Prizm LSi 1.8L No Start VIN: 1Y1SK5288S this vehicle came in as a no start it has no fire and no injector pulse we have tried a dist,ignitor,power relay,crank sensor, & a computer still nothing we have crank and cam signal to the computer we have checked all powers and grounds we have power to the i... |
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| 1997 GMC Jimmy SL 4.3L compressor VIN: 1GKDT13W9V A/C compressor (Delphi) is leaking at both ends, between body and end caps. A new comp is $350. I suspect that there is just an o-ring that is leaking. Is there any way to R & R o-rings? Do I need any special tools? Where do I purchase o-rings? I do have clutc... |
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| 1994 Pontiac Grand Am SE 3.1L Stall VIN: 1GN375W684 i hope you gm techs can help me with this car.this car came in with a miss and after the tune up it ran great.the customer came got it and he said after he picked it up he drove it for ten minutes and started popping and hesitating.then every time you would co... |
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| 1996 Pontiac Grand Prix SE 3.1L altenator VIN: 1G2WJ52M7T i have a 1996 grand prix that has a charging problem. i have bat 12 volts to the alt but i have no power to the small wire im not sure where it gets its power from but if i put ign 12 volts to it it will charge but will burn up the alt ive done this three time... |
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| 2000 Pontiac Montana 3.4L abs & ? VIN: 1GMDX03E3Y vehicle came in with complaint of poor brake pedal feel(hard). upon visual inspection we noted that it needed front brakes and rotors,also the rear wheel cylinders were seeping and one of the proportioning valves were leaking under the van.after repairing the ... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1976 Chevrolet Corvette Stingray 5.7L fuel leaks VIN: 1Z37L6S428 the info from the first reply was on the money-- made the job a lot easer and humorus--the info about the twisting really helped--replaced all hoses on top of tank--fixed the leaking problem--thanks again--K&S |
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| 1985 Chevrolet Corvette 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G1YY0783F Hurray the black vette is fixed. Allright here is how i found it, I was cking the grounds on the computer and pinning the wires at the maf all was cool , so i hooked everything back up and run the engine. She run smooth the stumbled so i started playing with w... Trouble codes: 33 (mass air high). |
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| 1988 Chevrolet V30 Cheyenne 7.4L front end VIN: 1GBJV34W8J Thanks to all who responded. Unfortunately, the customer has not returned for installation of a new steering box and steering dampener. Other suggestions included bad axle joints(they are new), shocks(new), cracked frame by box(ok), and seperated or fix-a-flat... |
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| 1993 Chevrolet Beretta GT 3.1L cooling fan VIN: 1G1LW13T0P we found the ground wire from the ecm was corroded and problem was corrected by cleaning and replacing the ground. many thanks to all those answering our request |
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| 1994 Chevrolet S10 Blazer 4.3L no power Thanks to all who responded. We checked the backpressure from the cat, but no luck. Fuel pressure was great, with no leaks. We had checked, checked and re-checked the timing, but still no help. Replacing both knock sensors seemed to help a little. But, get thi... |
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| 1994 Chevrolet Camaro Z28 5.7L waterpump drive leak VIN: 2G1FP22P1R thanks to the 4 tecs who replied, I had no idea there was a special tool to install this seal. one reply said the tool does not help, but i'll try anyways. we ordered the tool from kent moor # J-39087. the customer will return next month for the repair, which ... |
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| 1995 Chevrolet Astro CL 4.3L Poor Idle Quality, Surge, Stall, Misfire VIN: 1GNDM19W0S Jason, Run this test and then try whats listed below.. First run the Engine at 2000 RPM and check Timing if steady disconect knock sensor and check timing at idle should be steady. If the 2000 RPM test shows timing fluxuation then disconect the ALT Field and... |
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| 1996 Chevrolet Lumina 3.1L Stall VIN: 2G1WL52M4T Okay guys here is what I found.The number two O2 sensor,the wires were corroded.Took some contact cleaner and the problem was solved.Thanks for all your help. |
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| 1997 Chevrolet Astro 4.3L Steering/Hydraboost VIN: 1GBDM19W7V Thanks to those who replied! I bleed the air out again with vacuum & it seems to be better! I'm am also working on a 1995 Astro van that is not in for P/S noise & the noise is about the same as the 1997 that i'm working on! GM says it is a normal condtion/nois... |
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| 1998 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W5W Thanks for all the replies. Upon further inspection of the truck we found some vacuum leaks and repaired them. Now the truck runs great and the P0300 code is gone. We then found that there were PROM updates so we did them and boy does this truck run better. Ho... Trouble codes: P0300 (random misfire). |
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| 1998 Chevrolet Prizm 1.8L ignition lock VIN: 1Y1SK5288W We struggled with this case too long and finally learned that we recieved the wrong key cylinder and related hardware for this car. Another problem with after market repairs. Thanks so much to all who helped us. |
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| 1979 GMC K3500 5.7L fuel gage VIN: 1KL349B530 I want to say thank you to Gord McDonald. He faxed the wiring diagram to me and I was able to fix the problem. Leonard, from Texas had the same thought that I did. They used two systems at about this time, One switched the gage through the valve, and the other... |
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| 2000 GMC Sierra 1500 SL 5.3L converter VIN: 1GTEK19T3Y Hello All. I received several replies. Most suggesting that there is a driveability problem. To date, no success has been seen in fixing this problem. I have a GM rep. coming soon. I hope we find it. When we do I'll let everyone know what we find. Jim |
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| 1986 Oldsmobile Cutlass Supreme Brougham 5.0L Exhaust Valves VIN: 2G3GM69Y0G Thanks to all who replied. We found the valve guides only had .0005' clearance - enough to feel loose when moving valve up & down with cold engine, but with high exhaust temperatures from heavy load & high RPM's, they would swell up enough to cause exhaust val... |
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| 1998 Pontiac Sunfire 2.4L dash lites after checking charging system checked out ok trace all wiring under car to computer ok tried used computor no luck removed dah and checked all grounds ok tried reman cluster no luck also tried alarm module no luck did find some bad power wires and corroded re... |
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| 2001 Pontiac Aztek 3.4L Gauges & Other Items VIN: 3G7DA03E91 We installed a new BCM, and all is well. Had to take it to the local GM dealer to get the BCM reprogrammed. It did start & work even though the BCM had not been reprogrammed. I was worried about that after installing the new BCM, but that was nothing to worry ... |
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