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Professional Automotive Repair Technical Discussions for November 5, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1989 Cadillac DeVille 4.5L Poor Idle Quality, Stall, NO POWER VIN: 1G6CD115XK this vehicle won't stay idling on its own. when driving there is no power under acceleration (more noticeable under heavy acceleration). vehicle wants to stall but can be kept running by 2 foot driving (feathering accelerator). test & found no exhaust restrict... |
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| 1991 Cadillac Eldorado 4.9L no start VIN: 1G6EL13B7M I will try to some this one up the best i can, i have done a lot of testing and come to a few dead ends first vehicle will not start, no dash display, no heater, no interior lights when doors are open can turn on manually from the ignition switch i am gettin... |
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| 1989 Chevrolet S10 4.3L Excessive Emissions, Hesitation, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1GCGT19Z7K Runs rich on slow down and floods and dies. Data display all looks good except stays in clear flood mode all the time.No vacume leaks found since replaceing the T body gasket. |
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| 1993 Chevrolet Corvette 40th Anniversary Edition 5.7L Poor Idle Quality VIN: 1G1YY23P0P This Corvette was towed into our lot from a used car lot with a crank, no start. Diagnosed it to distributor. Replaced distributor with a reman from A-1 Cardone. (The one I took out looked like an old reman.) Had hard start and pinging under any throttle. Disa... |
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| 1996 Chevrolet C3500 7.4L No Start VIN: 1GTHC33J6T please help, this part of questionable quality has cost our customer and our shop much grief and stress, fuel pump power connection above pump under top of sending unit melts and goes open, ( very loose female terminhal on pins ), there is not enough material ... |
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| 1998 Chevrolet K2500 Cheyenne 5.7L Unknown VIN: 1GTGK24R4W fellow techs, we have a brain stumper, this truck initially came in for surging at idle hot, we scanned and found the transmission was going into lock up causing the engine to die at idle speeds, we checked fluid and it was very dark and burnt smell. we replac... |
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| 1998 Chevrolet C2500 Cheyenne 5.7L Hesitation, Surge, Misfire VIN: 1GCGC24R7W Number 3 clyinder miss going down road and feels like the truck is surging. Fuel trims are good only about 2% either way while driving and at idle. If you command egr off when driving miss goes away. So i pulled upper intake off every thing looks fine, egr por... |
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| 1999 Chevrolet Corvette 5.7L Hesitation, Stall, Misfire VIN: 1G1YY22G1Y hello every one this is what i got. i have a vette that is missfiring on all cylinders .# 4 the worst .we replaced the coil and crank sensor and tried a mass air flow and no differance .it sometimes stalls in reverse and it did have a low idle. i cleaned the t... Trouble codes: P0354 (ignition coil 4 pimary circuit d), P0300 (random missfire multiple cylinders) |
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| 2000 Chevrolet S10 2.2L Engine VIN: 1GCCS195OY Need help, Chevy techs! This S-10 has a ticking noise that is coming from under the valve cover in the rear. With the truck in park, if you throttle up the engine it starts to tick. No noise heard at idle. This thing has very low miles and is driven about 5 mi... |
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| 2001 Chevrolet Venture LS 3.4L interior lights VIN: 1GNDX13E11 the problem the vehicle is having is going down the road with the headlamp switch on or auto lights on the interior lights go out. the instrument cluster backlights,(not the odometer), the radio still works but all the lights go out as well as the heater contr... |
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| 2004 Chevrolet Tahoe LS 4.8L rear pads and rotors VIN: 1GNEK13V04 Customer came in reporting of squealing noise when braking. Inspected F/R brakes. Found original brake pads and rotors. Customer confirmed brakes never replaced since new. Front brake pads at 10% with normal rotor wear. Rear brake pads at 10% on outer pads on ... |
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| 2004 Chevrolet Astro 4.3L Poor Idle Quality, Misfire VIN: 1GNDM19XX4 Intermittant severe misfire only on cyl 3, will not happen when engine is cold, misfire gone above 900RPM as indicated by misfire counter. Spark plug, wire, cap and rotor all known good. KOEO fuel pressure within spec, spray pattern of injector 3 ok. Engine co... Trouble codes: P0303 |
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| 2006 GMC Envoy Denali 5.3L drivetrain VIN: 1GKET63M76 Hello everyone, thank you in advance for your time. this envoy happens to be my personal vehicle. the truck has an intermitent vibration that feels like its under the center console. the vibration will show up around 60 mph and go away if you select Awd on the... |
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| 1998 Oldsmobile 88 Royale 3.8L 1-2 Shift VIN: 1G3HN52K4W Thanks for the help. Serviced the trans, we use the BG flush machine, next day customer came back with a shudder and grab complaint pulling away from stops, no codes, transmission line pressure within specs, line pressure control solenoid amperage within specs... |
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| 2001 Pontiac Montana 3.4L No Start VIN: 1GMDX03E11 I got this van on the hook from another shop and I do not know the vans history.I have a hard start cold problem.It has good spark,50psi fuel pressure and injector pulse.I have no codes present.I can get it started if i cycle the key and crank it along time.Th... |
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| 1993 Saturn SC2 1.9L Excessive Emissions VIN: 1G8ZG1578P Hello guys i am working on this 1993 Saturn 1.9 twin cam . I can not get it to stop running rich . It has not set any codes .I have tried everything i can think of . Here is what I came up with . I replaced the o2 because it was old ,fouled and lazy .The plu... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2002 Cadillac Escalade 6.0L service stability VIN: 1GYEK63N12 We replaced the brake pressure sensor switch located on the Brake Pressure Modulator Valve (BPMV) (part number [...].)We then cleared the codes and almost 30 days later (hence the delayed closing)we have had no other problems. |
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| 2000 Chevrolet Astro 4.3L like timing out/ VIN: 1GNDM19WYB thanks guys,for your help the problem is solved. it was the reluctor plate on the front crank in front of the chain, was groove half a inch onkey slot. |
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| 2002 Chevrolet Silverado 1500 5.3L Stall VIN: 2GCEC19T02 I checked the fuel regulator ...no leaks. I removed the throttle body for a good cleaning but it was surprisingly fairly clean...no gunk. I cleaned it and the IAC valve anyway. I then decided to check the MAF sensor for possible contamination as advised by iAT... |
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| 2003 Chevrolet Suburban 1500 LS 5.3L mode door VIN: 1GNKF16T53 thanks to all that helped - i had the hvac computer updated. disconnected the battery and still had the same problem. so i ordered a mode actuator. after the installation of the actuator the problem was solved. |
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| 2003 Chevrolet Cab & Chassis Silverado 3500 6.6L Excessive Emissions, Black smoke Well, there was some good info sent, But I haven't been able to get back to truck due to shop/truck restrictions. I did check another Duramax that was in for service and the desired fuel pressure fluctuated, just not as much as our troublesome Tow truck. Trouble codes: P1093. |
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| 1997 GMC C1500 Sierra SL 5.7L No Start VIN: 1GTEC19MXV IT TURNS OUT THAT AC DELCO HAS UPDATED THIS PART, THE SENDER. I'M STILL WAITING FOR THE AC/DELCO REP TO GET BACK TOM TO ME TO SEE IF THE SENDER I PUT IN IS THE NEW ONE OR IF I HAVE TO CHANGE IT AGAIN, IT WAS SUPPOSE TO UPDATE 1ST PART OF THIS YEAR |
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| 2004 GMC Savana 2500 4.8L Misfire VIN: 1GTGG25V54 Had six replies on this one ranging from intake leaks to injector issues but i think Mike was the closest with a sticky valve. Pulling my hair out and not believing my test equipment i swapped injectors and coils. The misfire was still most prevalant in 6. Vac... Trouble codes: P0174, P3000. |
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| 2001 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NF52T51 Thank you all for the quick answers. I replaced the coil housing and the car runs great. As most said, you can't rely on an ohm meter to test , this is something that you just have to replace with a new one to test for sure. Thanks to all ,Tom |
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