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Prev Professional Automotive Repair Technical Discussions for June 14, 2011
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1999 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 1G4HP52K9X
Any ideas or help would be great on this one. Vehicle has a poor idle and misfire. No codes and seems to be cyl's 2 and 4. It does have a new lower intake gasket and upper intake but does not seem to change a thing. Plenty of spark, fuel pressure is good, good...
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2000 Buick LeSabre Limited 3.8L Transmission Dead VIN: 1G4HR54K3Y
Someone put a used transmission in this car before. The unit came out of a 2001 Buick Park Ave. Junk yard markings on the side cover. Not sure how long ago this unit was installed or if it ever worked. Scanned for codes and came up with nothing. Customer wants...
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1993 Chevrolet Astro 4.3L Transmission VIN: 1GCDM19Z8P
OK my fellow techs, as you already know the hardest problem to troubleshoot is the one that doesn't happen when you are trying to diagnose. This is my 93 Astro van and is in perfect shape, it is on the road all day every day. This van has an intermittent tran...
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1998 Chevrolet Malibu 3.1L fuel/temp gauge VIN: 1G1NE52M9W
customer brought car in with the fuel gauge and temp gauge not working. i checked fuses and found the fuse in the underhood fuse box marked A/C-BFC blown. replaced fuse and everyting went back to working. the vehicle worked fine for a couple days then came bac...
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1999 Chevrolet Lumina 3.1L Unknown VIN: 2G1WL52M7X
Hey all, I really need some opinions on this car. I wish I could give you more info and testing, but I have no idea were to go as the condition is intermintent. the condition(which has never been duplicated at my shop) as described by customer. Slow to start a...
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2000 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GKDM19WXY
This is a good customer of mine and a vietnam vet, dont want to let him down. He has spent a ton of money on this thing and I have donated way too much time. Any help with this vehicle will be greatly appreciated. I am a lone mechanic starting my own shop, nee... Trouble codes: P0300 (Random misfire although only 5 is missing.), P0325 (Knock sensor)
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2001 Chevrolet Silverado 1500 LS 5.3L 2-3 shift VIN: 2GCEK19T51
ok, 2001 chevy k1500 with 4l60e trans. the truck will shift from 1st to 2nd with no problems at all. then when it comes time to shift from 2nd to 3rd it will not come out of 2nd. it does not slip it just wont shift. I tried to manually shift it, and also i tri...
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2003 Chevrolet Impala 3.4L trunk open light VIN: 2G1WF52E53
Need help have a trunk open message when the trunk is closed and the trunk light is off. It has no codes in the BCM or IPC. The trunk adjar light works fine replaced the switch any way still no change. Also comes on when driving and appling and brakes or turni...
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2003 Chevrolet Avalanche 1500 5.3L valvetrain VIN: 3GNEK13T03
We are suspecting a camshaft issue on this Avalanche, I couldn't really pinpoint the valve train noise to either bank (also runs a little rough, no DTC's though, no misfires on datastream), pulled RH valve cover, re-attached coils, and ran engine, can put pres...
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2007 Chevrolet Silverado 1500 LS 4.8L Poor Idle Quality VIN: 1GCEC14C27
Hey all, have one here that is driving us nuts! This truck came in with a P0121 code about a month ago, brought it back today, said ce light would come and go, code was in history only. One of the techs checked the tac for carbon and carefully cleaned it. Rein...
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1995 Oldsmobile Cutlass Ciera 3.1L Hesitation, Misfire, MIL Lamp on VIN: 1G3AJ53M3S
greetings all. this thing has me pulling my hair out. Replaced the lower intake gasket due to an oil leak at the rear. I now have a hesitation and backfire under hard acceleration that the customer says was not there before. check engine light comes on intermi... Trouble codes: P1403, P1640
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1999 Oldsmobile Intrigue GLS 3.5L Stall, MIL Lamp on VIN: 1G3WX52H2X
Car was towed in stalled on interstate. When it was dropped off here tech went out and car started up and drove it in the shop. pulled dtcs and found 2 codes PO335 and PO385. did a wiggle test with wires going to crank sensor and car would stall. replaced some... Trouble codes: P0335, P0385
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2003 Oldsmobile Silhouette GL 3.4L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GHDX03E53
Customer reports that the vehicle drives fine most of the time but when he goes through Elwood Indiana at about 11 to 12 o'clock noon it starts stalling and he has to put the accelerator down to keep it going. It acts like it is going to die out completely. Th... Trouble codes: P0135, P1635
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Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Century Custom 3.1L Poor Idle Quality, Hesitation, Misfire VIN: 2G4WS52M8X
found the problem ! the pcm was fried after closer inspection i found several broken pins and melted socket at pcm.
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2006 Cadillac Escalade ESV 6.0L heated driver seat VIN: 1GEK63N26R
driver door module fix it Thankx every one for the help
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1999 Chevrolet Tahoe 5.7L abs VIN: 1GKEK13R6X
thanks everyone 4 the info we looked and found the 60 amp fuse missing replaced fuse all is good 4 now
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2002 Chevrolet Tahoe LT 5.3L Rear Diff Makes Noise on acceleration VIN: 1GNEK13TO2
I would like to thank all those who gave input on this situation. Since the remanufatured rear end had an issue, worse than the original unit, the reman company authorized our drivetrain tech to do a cover removal and inspection. what we found was the ring gea...
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1999 Oldsmobile Bravada 4.3L engine
I found 2 bent exhaust valves on cylinders 3 and 5. I was expecting the timing to be tdc when cyl 1 was on the compression stroke. I was confused in regards to the timing chain because of a GM timing tip I read. I had never heard that about GM, even though I...
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2002 Oldsmobile Alero GL 3.4L 1-2 Shift VIN: IG3NL52E42
Wow, thanks guys! This one isn't fixed yet, but it is diagnosed. Lane and Ted nailed it with a plugged cat. I did test drive and watched the "commanded gear" section, and while the shift was being delayed, the commanded gear was first gear. At first this led m...
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2005 Pontiac G6 3.5L No Start, Stall VIN: 1G2ZG52855
WELL THIS ONE IS FIXED. AS FOR DEALER UNABLE TO PROGRAM USED PCM IS PRETTY SAD. WE ORDERED A USED PCM FROM INTERNET THAT CAME PROGRAMMED WITH CURRENT UPDATE AND VIN NUMBER [...] AT A GREAT PRICE OF 130.00 SHIPPED TO OUR DOOR. INSTALLED PCM, RELEARNED SE... Trouble codes: C0242 (Pcm indicated tcs malfunction history), U2100 (Can bus communication), U2109 (Lost communication with pcm).
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