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Professional Automotive Repair Technical Discussions for April 20, 2004 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1995 Buick LeSabre Custom 3.8L Excessive Emissions, MIL Lamp on VIN: 1G4HP52L5S Hi All, Here we go again. 95 Low miles LeSabre has MIL on all the time. Clear Codes and returns right away. Even sets the code KOEO. Before I saw the vehicle the Knock Sensor was replaced and the Second Computer was installed. Visual inspection shows no proble... Trouble codes: P0325 (EST system Failure) |
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| 1997 Cadillac DeVille 4.6L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KD54Y7V This car was bought at an auction by the customer. It came in with P0300 and P1376. I cleared the codes and P0302 almost immediately came back. I swapped plugs between 2 & 4 with no change. I swapped wires also between 2 & 4 with no change. An injector drop te... Trouble codes: P0300 (Random Misfire), P1376 (Ignition Ground Circuit), P0302 (Cylinder 2 Misfire) |
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| 1989 Chevrolet V1500 Suburban Silverado 5.7L Steering VIN: 1GNEV16K9K I have been working on this vehicle on and off for over a year trying to fix steering/suspension problems. This vehicle "wanders" while driving, takes constant steering correction, and pulls to the right slightly when applying the brakes above 35 MPH. Work don... |
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| 1995 Chevrolet K1500 Cheyenne 6.5L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 2GCEK19SXS HI. Can anybody help. I dont know much about diesels.Complaint is hesatation, poor idle, lack of power at lower speeds.Scaned for codes found code 32 egr problem.Followed flow chart test,pass at this time.Load eng slightly ,eng miss.I disconect EGR valve and e... Trouble codes: 32 (EGR system problem), 96 (cyl bal fault 6 cyl) |
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| 1998 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W5W please help i have a s10 blazer with a po446 evap vent valve performance code. the cel lites every few weeks for the last 6 months. twice in the last 6 months i have replaced the vent valve because it leaked when comanded on. with the smoke tester i have .010 ... Trouble codes: P0446 |
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| 1998 Chevrolet Malibu 3.1L No Start, Anti-Theft VIN: 1G1ND52M9X Help! This vehicle is an intermittent no start. When the vehicle won’t start the anti-theft light is flashing. The red brick will not access the anti-theft system. So I have been researching the system and here is what I have learned about Passlock The Sys... |
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| 1999 Chevrolet C1500 Suburban 5.7L No Start VIN: 3GNEC16RXX this vehicle had belonged to a reg client and had been sold. it would not start one day and i was called. sounded like fuel starvation over the phone, told the owner to smack the fuel tank and the vehicle started. drove trhe vehicle a couple of days and then p... |
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| 1994 GMC Jimmy SLE 4.3L Hesitation, Cuts out, Stall, Dies at idle VIN: 1GKDT13WXR This 1994 Jimmy 4.3 CPI has been in for the same problem before and a previous tech had worked on it. Very intermitant dying problem seems to be only at idle and has done it hot and cold both. No misfire detected, fuel pressure within spec., distributer pickup... |
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| 1996 GMC W6 FORWRD 7.1L brake lights VIN: J8DH6A121T Brake lights inop. I have no wiring diagrams or info on this. Dealer wasn't very helpful. Have traced wires from front bumper to rear,all ok there. Fuses ok. Ordered brake light switch from dealer(stock). They sent a switch that works off air pressure. Problem... |
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| 1992 Oldsmobile 98 Regency Elite 3.8L battery drain VIN: 1G3CW53L5N This is my first time but anyways here it goes. We got this car in the old guy is a normal customer.If he lets the car sit for two days battery goes dead.It was an original battery so we replaced it and the alt.Now when i let the car sit with engine off and ke... |
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| 1984 Other GM R-600 RV 454CID Broken push rods VIN: IRF110312E Hello I need some imput on this RV it came to me with 2 push rods broken from valves sticking. Thought guides had caused this but when the machine shoplooked at them they said that maybe sugar had been put in it. The intake and heads were covered with 1/4 in... |
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| 1987 Pontiac Sunbird 2.0L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G2JB51K4H Vehicle came into shop with intermittent runability problem. Vehicle is running about 12% co high and low. Things that I have checked out are: Fuel pressure is 12 psi. Does not leak down. Stays solid Integrator is at 80 and block learn is at 128 o2 sensor is s... Trouble codes: 45 (rich exhaust) |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1995 Cadillac DeVille Concours 4.6L Excessive Emissions, Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1G6KF52Y3S The beast is fixed. Thanks Louis and Mark for taking the time to reply. It took yet another PCM to fix the car. It seems that Delco has a bad batch of PCM's and the dealer got all of them. I had another 95 come in so we took the ignition module and PCM from it... Trouble codes: P0023, P0025, P0083. |
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| 1989 Chevrolet S10 2.8L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall VIN: 1GCCS14R1K i want to thank everyone who responding to my help request.heath and myself appreciate it alot. 1. tps sweep .44 to 4.11 2. egr pintle good;not stuck slightly open 3. checked for chaffed wires;all good 4. vacuum good up to stall also check for internal... |
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| 1990 Chevrolet Camaro RS 3.1L Excessive Emissions, Poor Idle Quality, Stall VIN: 1G1FP23T4L This vehicle is finally fixed. First of all I would like to thank each and every person who took the time to read and respond to my request for help. There were some very good ideas on what to check for. The fuel pressure regulator was ok, as many had suggeste... |
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| 1992 Chevrolet Lumina APV 3.1L Surge, Misfire VIN: 1GNDUO6D7N Thanks to everyone that responded to my help request. I am happy to report that the vehicle has successfully been repaired. After receiving so many responses about the spark plug wires and how spraying them with soapy water won't always show them being bad, ... |
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| 1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W8T Greetings, I received many replies to this blazer. Most people I talked to agreed that you need a smoke machine to do any evap work, but they are pricey. Pressurizing the tank w/ inert gas w/the vent & purge solenoids closed, and using a gas analizer to sniff ... Trouble codes: P0442 (evap system small leak). |
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| 1997 Chevrolet K1500 Suburban LS 5.7L MIL Lamp on VIN: 1GNFK16R2V I received several replies to this post and want to first say thank you to all who responded. The general concensus was that I did have bad convertors on this suburban. Just for the heck of it I did try doing a Motorvac treatment on this vehicle but to no avai... Trouble codes: P0430 (Cat Efficiency). |
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| 1998 Chevrolet Tahoe LS 5.7L evo? VIN: 1GNEK13R4W wow!recieved 14 replies overnight!all replies indicated problems with the position sensor at the base of steering column.i suspected this might be the problem with my customers Tahoe.James from N.Carolina says-jump under the column and take the one bolt out an... |
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| 1999 Chevrolet Corvette 5.7L Oil Press. Gauge VIN: 1G1YY22G0X Thanks to all three who responded My Mitchell On Demand had wirring diagrams not specifically showing the communication lines from PCM to IPC; the fix wa - we sent out the IPC cluster to AJR international in Elmhurst IL, & they said that the IPC needed an upda... |
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| 1999 Chevrolet Express 3500 5.7L Misfire VIN: 1GBJG31R0X This has been gone for a few weeks and we have stayed in touch with the owner and it's been doing fine. Really have no idea as to why. The last thing we did was reset all adaptives before it was given back. Long term was at 0 but block learn I think was at 3. ... |
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| 2000 Chevrolet Silverado 1500 4.3L Poor Idle Quality, Cuts out, Stall VIN: 2GCEC19W1Y Got this one fixwed. Had 2 problems. 1st blue connector at vcm not fully locked in, This cleared up bcm error code, Next problem, Stalling, Thanks to Alex from California, AC hose was indeed leaking condensation onto dist, Rotor arcing inside and was causing m... Trouble codes: U1064 (BCM or VTD comm failure). |
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| 2000 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY12G9Y All the replies i got were to check the accelerator positions switchs and pcm which were already replaced on this vehicle. we found after much trial and error that the cause was the throttle actuator housing and throttle one piece unit but we still do not know... Trouble codes: P1120, P1121, 1515 (desired and actual tps do not match), 1516 (tps circuit). |
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| 2003 GMC Sierra 2500 HD SLE 6.6L MIL Lamp on VIN: 1GTHK23153 Ed [...] Howard were right on on the EGR vavlve. Thanks a lot for the help. The EGR valve diagphram was leaking. They are supposed to hold vacuum, and this one would not. The valve is a bear to change, but everything works great now. Trouble codes: P0404 (EGR open position performance). |
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| 1993 Pontiac Grand Am SE 2.3L No Start VIN: 1G2NE5434P I found #4 fuel inj. could not hold a load. When it was unpluged it tested fine. When powered it was shorted. Did fuel pressure drop test, #4 was the weakest. Used Vantage multimeter to check injectors as I fired them one at a time with homemade triger. # 4's ... Trouble codes: 35 (idle speed conrol switch or circuits), 62 (transaxle gear switch signal circuits). |
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| 1997 Pontiac Trans Sport 3.4L Power Sliding Door VIN: 1GMDX06E3V Hello fellow techs, I'm sorry it took so long to close this post but I was sooo determined to fix this PSD! First I want to thank Ivan, Randy, and Darwin for their help. Some very good suggestions such as checking for corroded door switch pad, checking PRNDL i... |
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| 2000 Pontiac Sunfire SE 2.2L Mechanical Thanks for all your help gentleman. We dug around out back and found a manual actually. The vehicle is fixed. Thanks again |
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