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Professional Automotive Repair Technical Discussions for September 14, 2009 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1994 Buick Skylark Custom 3.1L egr valve passages VIN: 1G4NV55M8R during gasket r&r we have just pulled the egr valve and found it full of milky fluid (like milk shake oil) but oil seems clean. pulling plugs now, but has any one seen this before and what should we be looking for next |
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| 1996 Buick Park Avenue 3.8L excess cranking VIN: 1G4CW53L3S Vehicle may often have a longer than normal cranking time before starting - always starts and is normal operation without any problem after running. Has platinum plugs, look normal. |
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| 1998 Buick Regal LS 3.8L Starter VIN: 2G4WB52K8W Has U-1255 code for Class II communications failure in BCM and ABS. Has several electrical issues. heater/blower intermittent operation, intermittent no crank, after engine starts security light stays on sometimes, sometimes after start service engine/ABS/trac... |
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| 2003 Buick Rendezvous CXL 3.4L Driveshaft VIN: 3G5DB03E43 This vehicle has a driveshaft clunk when shifting from Reverse to Nuetral or Drive to Nuetral. Is this considered a normal condition for AWD or will removal and inspection or replacement of the driveshaft cure this condition. One Bulletin I found addresses thi... |
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| 1993 Cadillac DeVille 4.9L Sailing away VIN: 1G6CD53BXP Hi all Cadillac or GM Techs,Car came in, at idle about 1800rpm, check for codes (27 & 30), replace ISC motor and adjust, at idle ok now (750-800rpm) as soon you put in drive and slightly accelerate, the car will sails away until you stop completely. I adjust m... Trouble codes: E30 (Idle Speed control circuit), E27 (Open throttle switch circuit.) |
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| 2000 Cadillac DeVille 4.6L Starting VIN: 1G6KD54Y3Y Customer said first the power windows,trunk,gas door were inop,then the next day the car wont start. Starter does not crank no dash lights no headlights,data link dead,interior light works.Battery is fully charged,all fuses and circuit breakers seem to be ok.f... |
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| 1986 Chevrolet Corvette 5.7L engine VIN: 1G1YY078XG We installed a Jasper reman engine due to lower engine problems and can't figure out what is makeing this car overheat. We installed new water pump, thermostat, cooling fan, radiator, cap & hoses. The engine temp would not stop riseing. Temp got up to 255 and ... |
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| 1991 Chevrolet R2500 Suburban Silverado 7.4L tcc, o.d. VIN: 1GNGR26NXM the transmission will start off shifting properly, then after a few miles will drop out of o.d. and lock up. and set a trouble code 68. the transmission shop replace the transmission pass through connector with the updated harness and we double checked the con... |
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| 1999 Chevrolet Blazer 4.3L Starting VIN: 1GNDT13W1X This blazer was towed in with a no start problem. It will start and shut off after a couple of seconds, so I know that it is in the anti-theft system. It has a code 1626 loss of communication with the VTD. It says to attempt to communicate with the VTD on the ... |
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| 2001 Chevrolet Suburban 2500 6.0L tow/haul light VIN: 3GNGC26U81 Have no information on this light. I have checked alldata plus mitchell for any kind of information. Found none, wiring diagram dosent even show this light. My scanner (modis) will turn on every light plus sweep every gauage, except this light. dosent even hav... |
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| 2002 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29U92 thanks to all that have time to help me. scantool misfire data # 7&8 misfire. i have spark. load test & balance test injectors. noid light on injectors. move coils, plug wires, & plugs from 7&8 to other cylinders. compression test 7 @ 160psi, 8 @ 165psi. thoug... Trouble codes: P0300 |
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| 2002 Chevrolet C3500HD 8.1L back fires VIN: 1GBM7H1E82 We had this motor apart to replace rings and bearings ie the oil pump pick up a piece of dibriss and locked up. Crank was turned. the problem we have now is truck runs good but after it is warm and restarted it will back fire from intake on first revolution of... |
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| 2003 Chevrolet Silverado 2500 HD 6.6L Speedometer VIN: 1GCHK23173 This vehicle has an inoperative speedometer. Resistance of VSS is 1400 ohms. The PCM does see a vehicle speed and it is displayed on the scan tool. Cruise control works, and no codes are stored. After researching the circuit on Alldata and a Mitchell book, it ... |
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| 2004 Chevrolet Aveo 1.6L Misfire, MIL Lamp on VIN: KL1TD52624 hello, have o4 aveo here having little problem. vehical came in with codes p0700 and p1781 traced problem to tcm(trans control module), after replacing module now getting code p0300 i don't feel a miss while driving (thats when light comes on and flashes) engi... Trouble codes: P0300, P0700, P1781 |
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| 2005 Chevrolet Astro 4.3L 3rd gear free revs VIN: 1GKEL19X25 Thanks for reading this post. I have this Astro van from a good customer who was too cheap to put a reman in, so Since I am capable, thought I would fix the problem with the one he has. it had no 3rd gear I took it apart and found the 3-4 clutch burned up so I... |
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| 2005 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 1GNFK16Z45 Group- I have a flex fuel k1500 4x4 5.3L that sets PO 171 and PO 174 while at idle. The freeze frame data indicates this happens while the engine is at 550 RPM's. I have pressure dropped the injectors and get the same drop throughout. Approx. 15 Lbs. Fuel pre... Trouble codes: 171 (Bank 1 Lean), 174 (Bank 2 Lean) |
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| 2006 Chevrolet Suburban 1500 5.3L service stability VIN: 1GNFK16Z66 vehicle came in for routine service and power steering fluid leak. we replaced the power steering gear box for seal leakage aligned vehicle and everything seemed ok. two days later vehicle came back with service stability system light on we pulled code c0455 f... |
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| 1991 Geo Tracker 1.6L Excessive Emissions VIN: 2CNBJ18U8M vehicle is running very rich,black exhaust smoke.o2 sensor always on rich side .960 volts even by creating manifold vacuum leak.i heared they have ecm problem but not sure if related to emmission problem. |
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| 2004 GMC Sierra 1500 5.3L Hesitation VIN: 1GTEK19T84 Hello and thank you in advance for any help. This problem started after the truck got detailed and the engine was washed. This vehicle has a lack of power on acceleration from a stop that started immediately after getting it back from detail shop. Once you rea... |
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| 1998 Pontiac Grand Prix SE 3.1L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1G2WJ52M2W Ladies and Gentlemen, it's been a while, I need your help again. This one is my daughter's car so I get to work on it on the weekends. What I have here is an intermittent condition consisting of multiple misfires accompanied by a P0654, Engine Speed Output C... Trouble codes: P0654 |
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| 1999 Pontiac Grand Am GT 3.4L hub aassy. VIN: 1G2NE52E3X Vehicle came in with ABS codes C1226 and C1233. Replaced with an Auto Z part. Lasted about a day. Then I replaced hub assy. with a Timken bearing and it was about a week before light came on again. Wheel speed sensor readings on scanner are all the same on a r... |
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| 2009 Saturn Outlook XE 3.6L Poor Fuel Economy VIN: 5GZER13D49 The owner of this Outlook does not think it gets the fuel mileage it should. He gets three to four less than the EPA. We have other customers with similar vehicles that say they get more than this Outlook. (One is an Enclave one an Acadia). It is a used car we... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 2001 Chevrolet Suburban 1500 LT 5.3L Mechanical VIN: 3GNEC16T91 YES IT WAS A/C COMPRESSOR THAT WAS THE PROBLEM,THANKS FOR ALL THAT REPLIED |
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| 2002 Chevrolet Cavalier 2.2L fule to cng VIN: 301JC52412 WELL THANK TO MARK AND THE OTHERS WE DID ALL THE TESTING WE WHERE 90% SHERE THAT IT WAS CNG MODULE BUT COAST WAS $1600 CUSTOMER WANTED ME TO BE 100% BUT WE COULD NOT DO ONE OF THE TEST DO TO WE COULD NOT COMAND THE UNIT HE SAID HE WOULD LOOK FOR UNIT ON WEB AN... Trouble codes: P1202 (alternate fuel engine control module afecm gass mass sensor circuit low). |
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| 2004 Chevrolet Impala 3.4L rear defogger VIN: 2G1WF55K44 I finaly got the car back in. On further testing I checked for a voltage drop at the back glass. It was 100%. I had checked the circuit bracker in the back of the right dash fuse box. On further inspection the circuit braker you can see by pulling the glove bo... |
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| 1998 Oldsmobile Silhouette GL 3.4L 1-2, 3-4 shifts VIN: 1GHDXO3E2W thank you all for the help. i was hoping for different replies, but facts are facts. remove replace and rebuild trans. thanks and god bless you all at iATN. |
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| 2002 Saturn L200 2.2L Timing Chain VIN: 1G8JU54F72 Thanks for all the replies. I decided to do it the right way & not cut corners. I did remove the lower timing cover and set the chain up the right way. I did check it three times before closing it up because it just seemed like a strange procedure especially s... |
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| 2007 Saturn Sky Red Line 2.0L drivers information center VIN: 1G8MG35X57 Thanks to all who took the time. The procedure is spelled out in shopkey and the owners manual and it is not pumping the accelerator 3 times. Been there, done that. Bryce from Arizona had it down. I have gone thru the procedure several times with the same resu... |
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