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Professional Automotive Repair Technical Discussions for March 15, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1991 Buick Century Custom 3.3L No Start, Backfire VIN: 3G4AH54N7M Removed cover to check timing chain. Timing chain is properly installed. Crank sensor was cracked, replaced, with no effect. Tried coils, module, and ECM. no effect. Balancer, and fins ok. Compared balancer with a new unit, to insure wrong balancer wasn't rein... |
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| 1991 Buick Skylark 3.3L Poor Idle Quality, Hesitation, Misfire VIN: 1GNC54NXXM vehicle has a miss at idle and is most severe in gear brake on. the car runs great when driving down the road. i found a miss #2 cyl. and replaced the injector no help. it also has a slight stumble when you take off. |
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| 1996 Buick Park Avenue Ultra 3.8L Stall VIN: 1G4CU5219T help gm gods. the problem did exsist before the line replacement. the vehicle will not act up all the time. it will stall on decel when turning. no codes are present and all scan data apears to be normal. we have looked for tsb's in shop key and have seen noth... |
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| 1998 Buick Regal 25th Anniversary Edition 3.8L MIL Lamp on VIN: 2G4WF5210W This buick runs great...check lite on..P0171. bank 1 sensor 1= lean I changed fuel filter, air filter, and cleaned the injectors. Tested fuel psi. ok Lite came on 1000 miles again. Same code. LT and ST fuel look out of wac. The freeze frame set at idle while w... Trouble codes: P0171 |
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| 2001 Buick Regal GS 3.8L steering wheel VIN: 2G4WF55171 this vehicles symptom is on parking lot manuvers involving right hand turns you get a flutter type vibration in the entire vehicle. it is not very pronounced but definatily there. this symptom has been there for about 2 months. the vehicle had michelin hydroed... |
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| 1996 Cadillac Seville SLS 4.6L Misfire VIN: 1G6KS52Y3T This thing is pulling out what i have left of my hair. It keeps cracking the number 5 plug. We have installed 5 new ones all Ac Delco by different sockets, by different Techs, and the Plug still cracks. It has all new parts around it. We look down the hole and... Trouble codes: P0305 |
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| 1990 Chevrolet C60 Kodiak C6H042 6.0L Hesitation, Surge VIN: 1GBG6H1P5L I am having a hard time finding any info on this truck. I want to know what should the fuel pressure be on this one. It is a throttle body with the 90 deg small inj's. I have called our local dealer but they got rid of the heavy duty side. Just searching for i... |
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| 1997 Chevrolet Express 2500 5.7L overdrive VIN: 1GCGG25R0V I have this van that came in with a 4L80E transmission with shifting problems approx. 18 mo. ago. You can be driving at highway speeds 55-60 mph and lightly accel and trans either goes into neutral or I suspect 1st gear. Trans shop overhauled and returned to c... |
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| 1998 Chevrolet Express 1500 5.7L Coolant VIN: JN1CA31D91 This Van Came In 6 months ago with oil in radiator At that time we suspected oil cooler in radiator leaking.It also at that time had intake gasket leaking (can you belive that)so we repaired the gasket flushed the coolant system and replaced all the oil soked ... |
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| 2000 Chevrolet K2500 5.7L front rotors VIN: 1GCGK29R6Y hello and thanks for your time. the customer has had problems with brakes since new. the front rotors warp, it does not wear out front pads, the rear shoes have not been replaced and look good for the miles and the amount of front brake work it has had, it act... |
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| 1998 GMC Jimmy Envoy 4.3L No Start, Stall VIN: 1GKDT13W5W Hi Everyone Have this 1998 Jimmy in the shop that will just stall intermittently and not re-start. The first time it just restarted after a few mintues. The last 2 time was towed and I jumped in and it started first time. I a thinking fuel pump but can't prov... |
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| 1986 Oldsmobile Cutlass Supreme Brougham 5.0L Exhaust Valves VIN: 2G3GM69Y0G This car does have a 5.0 "Y" Oldsmobile engine, although that was not one of my choices when posting. The complaint is the engine starts running poorly under heavy load. We test drove several miles and on long, uphills at high RPM's the engine started losing p... |
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| 1991 Oldsmobile Silhouette 3.1L window motors VIN: 1GHUD06L9R replaced both motors the left side now works fine the right side workes up but will not go down from either side |
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| 1992 Oldsmobile Bravada 4.3L Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1GHDT1GHDT vehicle surges on cruse and runs rough at idle and some times stalls |
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| 1997 Oldsmobile Aurora 4.0L Sudden Excessive oil consumption VIN: 1G4GR62C6V Car belongs to my partners daughter. just purchased 2 months ago used. No intial oil consumptuion the suddenly ~ 3 weeks ago started useing massive quanities of oil. IE 8 quarts in 700 miles or about a quart per hundred. Found a service bulliton on cadalac mot... |
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| 1998 Oldsmobile Aurora 4.0L Stall VIN: 1G3GR62C7W cant tell what is causing this stall, only at idle in gear after sitting at a light about 1 minute rpm about 600 just dropps dead, restarts immed. Trouble codes: 1590 (stall conditionor near stall) |
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| 2001 Saturn L300 3.0L abs light VIN: 1G8JW54R01 This vehicle has the ABS light coming on intermittently-it has come on 3 times in the last week, it goes off 2 out of three times by turning the key off and then restarting the vehicle. One time it took 3 restarts before going off. Additionally, we have felt t... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1996 Buick Regal 3.8L Transmission Temperature Sensor VIN: 2G4F52K5T1 Installed new temp. sensor in trans. because I all ready had it torn down.Still displayed 278 degress on scanner. their is nothing left but the PCM . installed remanufactured PCM and this fixed the car. Summary Duane from Michigan offered the most help (hi... |
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| 1997 Cadillac Catera 3.0L No Start VIN: WO6VR52R3V Well my buddy is still up in the air about what he's going to do with this Caddy that zags when it should zig... I got 3 replies pretty much backing up what I had told him, which was get 2 fresh modules from GM and get them set up at the same time. He may try ... Trouble codes: P1503 (Theft deterrent password incorrect), P1564 (Long term reset), 13 (immobilizer system Module not programed). |
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| 1988 Chevrolet C1500 Cheyenne 5.7L Differential VIN: 1GCDC14K2J Thanks to all who replied. Many emailed me directly with part number for reprograming kit. Ended up using a 3.42 differential. Worked out great. Speedometer reprograming was not rocket science, once you guys explained the procedure. Problem I had with speedome... |
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| 1989 Chevrolet C2500 Cheyenne 5.0L coolong sys VIN: 1GCGC24K6K I would like to expres my sincere 'THANK YOU' to those who took the time to answer my help request. Replacing the intake manifold solved the problem. I may have understated the amount of time that was allowed for the residule antifreeze to burn off from the or... |
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| 1991 Chevrolet K2500 Cheyenne 5.7L pressure plate VIN: 1GCGK24K1M I received 15 replies. All good and helpful information. This paticular problem was caused by the presure plate. It was indeed bad(uneven fingers causing incomplete release). Other possible things to check included, flywheel surfaced too thin, check for adjust... |
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| 1999 Chevrolet Express 3500 7.4L Poor Idle Quality, Misfire VIN: 1GBJG31J7X Many thanks to all who responded. We were never able to get the fuel pressure above 50psi at an idle. An injector balance test showed an even pressure drop on each injector. We cleaned the injectors twice and it was getting better. We ended up replacing the ... |
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| 1999 Chevrolet Silverado 1500 4.8L Poor Idle Quality, Surge, MIL Lamp on VIN: 1GCEK14V1X Thanks to all that replied and took the time to read my help request. Several of the replies indicated that I was getting unmetered air from some where. I had checked this twice before and could find no vacuum leak. I checked it again with the engine overnight... Trouble codes: P0171 (sysem lean), P0174 (sysem lean). |
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| 2001 Chevrolet Silverado 2500 HD 8.1L MIL Lamp on VIN: 1GCHK29G61 Well, this vehicle appears to be fixed. I replaced the CMP sensor with the current replacement from a local GM dealer across town and then cleared the code. The truck seems to start everytime now without a problem. The other two dealers close by had these CMP ... Trouble codes: P0342 (cmp sensor ckt signal low). |
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| 2002 Chevrolet Silverado 3500 6.6L water in fuel VIN: 1GTHK29102 Only one reply but Eric hit it right on the head. In the wiring loom atatched to the bracket near the alternator the yellow wire had chafed thru. sealed the wire and taped it up and all is well. Thanks, the local dealer had put in a sensor and dash cluster and... |
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| 2001 GMC Yukon XL 1500 SLT 5.3L Front tires VIN: 1GKFK16T91 Thanks for all your input, folks. Unfortunately I ended up in the hospital and am recovering from back surgery. I received some noteworthy replies. A few of them made mention of inner tie rods that can only be detected with the wheels on the ground. Others not... |
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| 1992 Oldsmobile Achieva S 2.3L serpentine belt tension VIN: 1G3NL14A8N I received 9 replies which ranged from wronk crank pulley, 2 different belts (high output = shorter belt), wrong alternator pulley, a/c pulley too small, and improper routing. We ended up just putting on a shorter belt and it seems to be fine. I believe Mark [...]... |
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| 1991 Pontiac Grand Prix GT 3.4L Poor Idle Quality, Surge, Stall VIN: 1G2WP14XXM intake gaskets were big reply,some said ground problem,i replaced the o2 sensor that helped alot,repaired vacuum leak under upper intake at fuel pressure regulator,car is 90% better but still not 100% fixed,customer is driving it right now and says it has only... |
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| 1998 Pontiac Sunfire SE 2.2L Theft System VIN: 1G2JB1246W I want to thank Mick [...],sorry I miss one guy. They all gave us good information. But sorry to say car still not running. Gene |
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| 1999 Pontiac Grand Prix GT 3.8L low oil level light VIN: 1G2WP52KXX Thanks for the replies especially Tim from Fla who took the time to explain in detail how the system works.And also Tim from Ohiowho told me about the chaffed wire at the rear of the trans which is what the problem was .Friend is now happy with my ability to f... |
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| 1995 Saturn SL1 1.9L Cooling Fan VIN: 1G8ZG528XS Many thanks to Ernie [...] suggested and replaced both sensors, the CTS as well as the temp. sending unit. I also replaced the CTS harness, as the old one appeared mildly corrode... |
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