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Professional Automotive Repair Technical Discussions for November 18, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1998 Cadillac DeVille Concours 4.6L Radio, windows VIN: 1G6KF5498W Radio and windows--retained power relay--- turning on with key off intermittently draining battery. Has only happened once while in the shop. Was able to catch it powering up radio on and off several times b4 it finally shut off. Unplugging relay under hood an... |
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| 1986 Chevrolet Corvette 5.7L Voltmeter VIN: 1G1YY078XG Charging starts out great (as high as 15.1), slowly drops off to 11.6 v at idle with all accs. on. Battery is new. Alternator has been replaced 3 times, the last one being a 140 amp. hi- output. Voltmeter inside is .75v lower than actual. Amp test ok. All conn... |
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| 1995 Chevrolet C3500 5.7L shift solenoid A VIN: 1GBGC34K8S Hi ITAN members my problem is a 95 Chevy PU 3500 with no first or forth gear. This truck came to me after the transmission shop finished with it. They did a total rebuild, and we can get it to shift through all gears, but I have to manually ground the A soleno... |
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| 1996 Chevrolet K1500 Cheyenne 5.0L instrument lights,gauges VIN: 1GCEK19M8T Hi everybody Im hoping somebody can help me with this one.This came in for no start problem.The customer put a module in it thinking that was the problem.Now when you turn the key it cranks fine but nothing powers up including the dash,fuses boxes diagnostic p... |
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| 1999 Chevrolet Silverado 1500 5.3L Shifting,power VIN: 2GCEK19T5X In 'D' or '3' truck has no power, engine won't rev above 2K rpm. Feels like it's starting in 4th gear. In '1' or '2' accelleration feels normal. Live data shows PCM is commanding the shift solenoids properly. The TFP switch combinations in data are mostly inco... |
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| 2001 Chevrolet Cavalier 2.2L can not shift VIN: 1G1JC12421 HELLO, This car only does this every once in a while, it will not shift into any gear WITH OR WITHOUT ENGINE running [not temperature related]. Then you will come back to it and it will shift like butter. The fluid has been changed with ATF per specs. The lin... |
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| 2002 Chevrolet Trailblazer LS 4.2L using motor oil VIN: 1GNDT13S02 Wow! We changed the oil in this TrailBlazer in August, and the owner said it was using oil. The oil was dirty, and we told him to see how it did on a fresh change. It still looks clean, and the customer has added 4 QUARTS since August!! Only 2700 miles, mostly... |
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| 2005 Chevrolet Silverado 1500 4.3L Poor Idle Quality, Misfire, MIL Lamp on, Hard Start VIN: 1GCEC14X85 Ok guys I have this Two wheel drive chevy that runs rich on both banks. This is a newer 4.3 that is a returnless fuel injection system.It set a random misfire code and all of the listed codes. Looking at the history it has missed on all cylinders but the the b... Trouble codes: P0172 (System rich bank 1), P0175 (System rich bank 2), P0300 (Engine Misfire), P0455 (Evap gross leak detected) |
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| 2005 Chevrolet Impala 3.4L power steering pump & leaks VIN: 1G1WF52E05 Any ideas on the fluid loss and why the p/s pumps are so noisy?? |
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| 2006 Chevrolet Tahoe Z71 5.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNEC13Z26 Concern is intermitant. When it occurs, engine develops a bad miss and misfires are indicated on Cyls. 1,3,5,7 in decreasing numerical order respectively. (5465,545,394,296) Injector pulse width at normal idle B1=3.57 mS, B2=3.49 mS. IPW when misfiring B1=5.63... Trouble codes: P0030 (ho2s b1 heater control circuit), P0171 (bank 1 fuel trim leam), P0300 (random misfire), P0134 |
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| 2000 GMC Sierra 1500 SL 4.3L oil pan VIN: 1GTEC14W3Y The engine has a noise between 1800 and 2000 rpm. Iam trying to remove the oil pan to remove the timing cover to check the balance shaft as per a GM bulletin. I have removed the oil pan bolts 5 on each side and 2 to the transmission but the oil pan doesnt budg... |
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| 2004 Oldsmobile Alero GL 2.2L passkey VIN: 1G3NL12F64 I have to program new keys to the system and was wondering if anyone knew how to do this without a tech2 scanner. I guess earlier systems were able to program without a scanner but am unable to see anyway to do this without a tech2. Please help. |
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| 1997 Pontiac Sunfire SE 2.2L Excessive Emissions, Misfire, VIN: 3G2JB524VS vehicle failed smog test due to mil on. had random misfires on all cylinders. sputtered in park until rpm reaches about 3300, then smoothes out and rpm increases to 3900. ease up on gas and then rpm drops and starts sputtering again. scan tool shows that timin... Trouble codes: P0300, P0172 |
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| 2001 Saturn L300 3.0L pedal pos sensor VIN: 1G8JW52R31 has anyone had experience with this problem . the pedal postion sensor 2 is reading 4.9 volts and sensor 1 is reading .2 at idle.the throttle posistion sensors 1 and 2 read the same . I have been told by a saturn dealer tech that this is being caused by a over... |
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| 2006 Saturn Ion-3 2.2L lock cylinder VIN: 1G8AL55FX6 Have this Ion I need to replace the lock cylinder and housing. Not sure how to remove the air bag/horn pad from the steering wheel. Looks like it should just pull off. Thanks in advance, Smitty |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1965 Chevrolet impala 350CID Stall VIN: 166375D131 first i want to thank everyone for all there great thoughts on my issue,i did check and do about every thing that was mentioned,from checking the push rod while running to installing 3 different fuel pumps including an electric pump.after checking fuel pressur... |
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| 1992 Chevrolet S10 Blazer Sport 4.3L Cuts out VIN: 1GNDT13W2N AFTER ALL THE CHECKING WE HAD DONE NOTHING REALLY POINTED TO THE INJECTION SPIDER WE CALL IT, PULLED UPPER INTAKE NO FUEL LEAKS, DECIDED TO TAKE A CHANCE REPLACED UNIT,AND 2 WIRE INJECTOR HARNESS WALLA FIXED. THANKS FOR ALL THE HELP. AS ALWAYS IATN IS THE GREA... |
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| 1993 Chevrolet P30 Motor ho 7.4L hydroboost/power steering VIN: 1GBKP37N7P Many thanks to all who replied, especially Brent from Michigan. This motorhome has a hydrolic assist park brake with a resourvour near the tail of the transmission. On top is a bleeder screw. This is a dead head system with a single line from the control valve... |
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| 1994 Chevrolet Astro CL 4.3L blower motor VIN: 1GNDM19Z1R Sorry it took so long to close this, I wanted to make sure it was fixed. Thanks for all the replies. They ranged from checking the airflow across the resistor, to a non factory blower motor to an updated relay and harness. The air flow across the resistor w... |
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| 1995 Chevrolet Camaro Z28 5.7L Detonation VIN: 2G1FP22P4S Good Morning All, This vehicle was just awful to work on. It will take me a few days to heal. It ended up being a very slight leak in the head gasket between # 3 and # 5 cyl. Thanks so much for all the replies. I ran a comprehensive test with my Sun-450 and th... |
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| 1997 Chevrolet C3500 5.7L No Start VIN: 1GBJC34R6V Found rear sending unit submerged in a puddle of mud and debris. Shot it off with shop air and low and behold there it was a completely rotted connector and sending unit. So in the end we replaced the rear sender, the front fuel pump,the feeder pump, which was... |
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| 1998 Chevrolet Cavalier Z24 2.4L Clutch VIN: 1G1JF12T6W Thanks to all for the helpful info. I ended up replacing the after market clutch slave with a Delco unit, bled it and it has been fine since. |
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| 1999 Chevrolet Tahoe LS 5.7L Pre Detonation VIN: 1GNEK13R6X Thank's for all your help. I replaced the cam sensor and set it to o zero degrees and test drove problem solved, Thanks again Bob [...] |
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| 2001 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNDM19W2B Thanks to all who responed. The majority response was an internal fuel leak, either an injector, fuel pres. reg. or one of the spider tubes was seeping. Between the rich code, and the longer than normal cranking when hot it would seem to make sense. What made ... |
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| 2001 Chevrolet Cavalier 2.2L gauges do not work and temp/fuel light on VIN: 3G2JB524X1 Yes, this is fixed. The cooling fan was defective, replaced it and all is now good. The gauges/dash has been good for a month. All that was done was disconnecting the battery and resetting the BCM. Have suspicion that the BCM may be defective, but all is g... |
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| 2002 Chevrolet Suburban 1500 LT 5.3L dome light VIN: 1GNFK16Z32 After suggesting some additional tests, which I was able to eliminate the possibility of, I'm concluding that the BCM is having issues. Some suggested that the lighting control relay input was grounded, but I eliminated that possibility since I could command t... |
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| 2004 Chevrolet Malibu LT 3.5L transmission leaking VIN: 1G1ZU54894 Well it has been a week and no come backs, we went ahead and replaced the pan as suggested and a new oem gasket and everything seems fine, thanks so much for everyones help. |
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| 2007 Chevrolet HHR LS 2.2L front end VIN: 3GNDA13D47 HEY GUYS I FIXED THIS IT WAS THE ELECTRONIC POWER STEERING,I HAD TO REPLACE THE STEERING SHAFT AND I APPRECIATE EVERYONE WHO REPLAIED TO HELP REQUEST THANKS FOR EVERYTHING. |
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| 2005 GMC Envoy XUV SLE 4.2L Hesitation VIN: S356168008 I sent to dealer for warranty they told him the ploblem was plug in air freshener nighty dollars thank you very much. got truck back tested battery no good replaced battery been about two weeks all is well . Trouble codes: P0601. |
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| 1998 Oldsmobile 88 Royale 3.8L 1-2 Shift VIN: 1G3HN52K4W Thanks to everyone who responded, the fix, transmission pressure control solenoid. Thanks again Paul at Powell Garage |
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| 1999 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52K1X sorry for the delay, ended up in the hospital for a few days. the problem turned out to be a defective mass air sensor. i didn't realize that all those sensors from my regular parts stores are remans.thanks for the replies they were helpful. Trouble codes: P0171. |
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| 1994 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZG5597R Thanks for the quick responses on this. This code 26(quad driver failure) was caused by the upshift light being burned out. The light is in the lower right of the cluster and it uses a 74 bulb. Don't be fooled by this, if the light does not come on when dri... |
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