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Prev Professional Automotive Repair Technical Discussions for December 4, 2008
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Open Help Requests for GM
Help Request Answers
1994 Buick Roadmaster 5.7L heater VIN: 1G4BN52P9R
HI guys I have car in the shop that when you first start it in the morning it takes longer than normal to get heat out of the heater. any ideas as to what could cause this? heater core maybe? once the car is running for about 1/2 a hour the heater will work go...
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1997 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K4V
vehicle came in with intermittent no-start condition. could not duplicate for 2 full days. did some other brake work in the meantime. parked it for pick-up, naturally when the customer came to get it... no start. cranked it over approx, 5 times, while attempti...
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1990 Cadillac DeVille 4.5L Poor Idle Quality, Hesitation, Surge, Cuts out VIN: 1G6CD5338L
THis vehicle has no miss. When you put it in drive it does't stall. It only acts up when you are going down the road. When you accelerate it surges up and down. Any helpful suggestions would be appreciated thanks
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1995 Chevrolet Blazer 4.3L computer VIN: 1GNDT13WOS
Vehicle will not comunicate with smog machine.Scan tool comunicates no problemb 2007 domestic or global obd2, no trouble codes.Replaced vcm with used unit with no change.I had simular problemb with a simular vehicle vcm fixed it.Not so lucky this time.Does smo...
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1999 Chevrolet S10 4.3L Hesitation, Surge VIN: 1GCCT14W6X
Here we go again but this time its my wifes truck. All the info I have right now is it died on her while driving. Said it was running but `just wouldnt go then cut off`. Had it towed to shop & of course it started right up. It doesnt have the power it should b...
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1999 Chevrolet K1500 Suburban 5.7L slips 1 to2, slips 3,and 4 VIN: 3GNFK16R1X
This 1999 chevy was brought over for a transmission problem. No forward gears, upon pulling it down. I had a hard time getting the input housing and shaft out. The front planitary gears were burnt completely up. So I completely tore the transmission apart for ...
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2000 Chevrolet Blazer LS 4.3L 4 wheel drive VIN: 1GNDT13W2Y
Vehicle comes in with "service 4 whl drive" lamp on. Set up scanner and retrieved code B2725 Active transfer case mode switch fault. Erased code and drove very briefly, lamp was off but came back on in short time. As long as the lamp is off the 4 wheel drive w...
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2000 Chevrolet Prizm 1.8L MIL Lamp on, P171 VIN: 1Y1SK528SY
the car came in with p171 in memory codes. i took out the maf sensor and it was bad dirty cleaned it and car was fine for about 100 miles then light came back on and the lt fuel trim was at 32%. so i smoked the intake and found nothing i smoked the exhaust and... Trouble codes: P0171
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2001 Chevrolet Impala 3.4L temp gauge VIN: 2G1WF52E51
the temp gauge will sit at the bottom,with my modis i can read normal temp,and i can sweep the gauge.the only other issue i know of is when i ran it in cold[20 deg far.]the cooling fans were running with the key shut off.customer stated this doesn't happen all...
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2002 Chevrolet Astro LS 4.3L Misfire, MIL Lamp on VIN: 1GNEL19X82
I could use some ideas on this one. Truck came in for intermittent ruff running and check engine light. I scanned and found p0300. Misfire history showed miss on 1,5, and 6 with 6 being the worst buy far (15,356 misfires recorded). Pulled #6 and found some ash... Trouble codes: P0300
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2002 Chevrolet Trailblazer LS 4.2L battery draw VIN: IGNDTI3S72
see any problems with battery draws tested several hours no draw 3to 5 day battery dead
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2004 Chevrolet Express 3500 6.0L No Start VIN: 1GAHG35U43
Replaced engine with used engine for severe overheat condition. Engine turns over but will not start. Can communicate with BCM but cannot access security system information. Has code P1626 stored, have already replaced BCM and programmed with no change Trouble codes: P1626
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2005 Chevrolet Malibu Maxx LS 3.5L No Start VIN: 1G1ZT62815
tHIS VEH. WAS TOWED IN FOR NO START CONDITION FOUND TWO CODES IN PCM U0107 AND PO606 RAN FLOW CHART ON U0107 FOUND THAT THROTTLE BODY WAS DEFECTIVE REPLACED AND STILL HAVE A NO START ALSO HAS A DISPLAY MESS. ON RADIO ONE SAYS "REDUCED ENGINE POWER " THE OTHE S... Trouble codes: U0107 (Throttle Actuator Control TAC Module Serial Data Circuit), P0606
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2007 Chevrolet Equinox LT 3.4L ABS Motor VIN: 2CNDL63F77
This car came in from the body shop for A/C repair and recharge after front end was repaired. It has since snowed here and when the vehicle was driven out, we spun the wheels due to ice and the ABS motor just makes the loudest noise. All other Trac Controls I ...
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1995 GMC Safari 4.3L Poor Idle Quality VIN: 1GDDM19W9S
G.M. guys. I can't remember enought about the old pre OBD stuff to figure this one, the other problem is repair flowchart says to use some equipment I don't have. Let me explain it best I can, Cold start it goes to 2000rpm then settles down in about 20 sec's, ... Trouble codes: 35 (Idle control malfunction)
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1998 GMC Savana 3500 6.5L Cuts out, Stall VIN: 1GTHG35F1W
waveform on cam signal o.k. waveform on high res. was cutting out.no code p370 set. also, wiggled wires , no affect. Trouble codes: P0251 (injection pump cam system)
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2002 GMC Sierra 2500 HD 6.6L heater VIN: 1GCHK24192
Vehicle takes forever to warm up 1hour. Will not defrost windshield while idling. Blend door works as it is supposed to. Not much of a deisel tech. The fan clutch appears to move too much air when cold.
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2003 GMC Sonoma SLS 4.3L 4x4 VIN: 1GTDT13XX3
This Vehicle came in with only 2wd working .Will Not Switch to 4H or 4Low. Switch does bulb check when key turned on. Did research and try to use Tech2 to talk to the 4x4 module(TCCM) Tech2 did not give option to communicate with TCCM used modis and will talk ...
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2002 Oldsmobile Bravada 4.2L MIL Lamp on VIN: 1GHDT13S12
I have tried a cam sensor, crank sensor, and exhaust cam solenoid. Problem is intermittent. Trouble codes: P0014 (exhaust camshaft phasing error)
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2000 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1G2NF52T6Y
Car is running very rough , with a idle that is surging or running up and down. Also running very rich. Scanner shows all 4 cyl are missfiring. Found broken vacuum hose to map,dirty throtle body , and two quarts low on oil. Remedied all these items, and also c... Trouble codes: P0300, P0172
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2001 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NF52T11
Good morning! I have the vehicle belonging to one of our auction driverís. Sure Iíll take a look at it. For some reason driveability on GM vehicles is humbling. Vehicle has a constant erratic miss that is most noticeable at idle, still there on light to mode... Trouble codes: P0300 (Random Multiple Misfire)
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2002 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NF52E72
This car will intermittenly not start it has spark and fuel press. is ok. It has no injector pulse unless I unplug the coolant sensor then it will get inj. pulse and run. If I shut it off and then try to restart it will lose pulse till I unplug the sensor agai... Trouble codes: P1546
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1998 Saturn SL1 1.9L ignition key VIN: 1G8ZG5286W
Ignition key not removable from lock cylinder, turns normal, starts car, but cannot remove key
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Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac DeVille 4.6L interior fuse VIN: 1G6KD57Y81
DUE TO THE RESPONSES,I FOUND THE PASSANGER SIDE WIRES WORN THROUGH ON THE VANITY MIRRIOR. THEY WOULD SHORT OUT WHEN MOVING IT UP AND DOWN.THANKS FOR THE HELP!
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1993 Chevrolet K1500 Cheyenne 4.3L Poor Idle Quality, Stall, MIL Lamp on VIN: 1GTEK14Z8P
Sorry for the delay but I just got back to this beast.I thought I posted all the PIDS and fuel press.etc. but my lack of computer savvy was shing through! Anyway the problem ended up being bad grounds,the one on the back of the head was the main culperet. It w...
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1998 Chevrolet Camaro Z28 5.7L MIL Lamp on VIN: 2G1FP22G4W
thanks to all the replies, albert "hit the nail on the head" as i talked to the tech that installed the motor & asked had he done crank relearn, he had not. performed relearn & problem solved. usually when techs have a problem i can solve it in minutes, but no... Trouble codes: P0300.
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2001 Chevrolet S10 2.2L 2.2 Eingine VIN: 1GCCS14S10
I got a 2.2 litre for a cavilier of the same year. You have to swap a lot of things including the timing cover and oil pan but it can be done. This is a nice little way to save some money though. Thanks to everyone for their help.
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2003 Chevrolet Trailblazer LS 4.2L Automatic Transfer Case VIN: IGNDT13S42
Thank you to everyone who replied, all your comments helped me very much. After much testing and head scratching (could not command the motor) I deferred further diagnostics to a friend at a chevy dealership. He redid my tests, along with running the motor ind...
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2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNDT13S23
thanks for the four replys,as i said in my post when the car came to me i was going on what customer and dealer found as far as code p1280 goes. after lab scope and solus graphing for several days on and off and could never get trailblazer to act up, i went wi... Trouble codes: P1280 (accelerator pedel position circuit-sensor 2).
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2004 Chevrolet Silverado 2500 HD 6.6L Excessive Emissions, WON'T TOP 20 MPH VIN: 1G13HC2418
Hey, this is Earl. Basically, this truck was my worst nightmare. It even came in on Halloween, which might have been an omen if I were superstitious. In my 35+ years of raw experience in the auto repair industry, I have never run into something I couldn't figu...
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2006 Chevrolet HHR LS 2.2L MIL Lamp on VIN: 3GNDA13D06
Mr. Service Manager refered the customer to a dealer this morning, after all our efforts to figure this one out. Bill [...] has been a HUGE help on this, HUGE! If any-a-ya'll run into this look at the harness in the neighborhood of the oil filter. There's wad-... Trouble codes: P0700 (transmission control fault), U0073 (bus line fault).
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2002 GMC Savana 1500 4.3L Misfire, MIL Lamp on VIN: 1GTFG15W32
This one took sometime to fix because of getting customer to bring the van back.Replace crankshaft sensor and added a shim and it fixed it.The bottom of the sensor was scuffed like something was hitting it. Trouble codes: P0300.
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2004 GMC C5500 Topkick C5C042 6.6L Misfire VIN: 1GDE5C1184
THANKS TO EVERYONE WHO REPLIED! I USED THE TECH 2 TO DISABLE ONE INJECTOR AT A TIME IN ORDER TO FIND OUT WHICH ONE WAS CAUSING THE PROBLEM. IT WAS #4, NOW I NEEDED TO DO THE SAME IN ORDER TO FIND THAT CYLINDER. WITH A LISTENING DEVICE ON HEAD I SHUT OFF THAT I...
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2000 Oldsmobile Bravada 4.3L Electronic VIN: 1GHDT13W7Y
Thanks everyone for your Help!! I did check power and ground to the control head and found no issues. So I replaced the control head with a new one and every thing is working properly. Thanks again to everyones help.
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2006 Pontiac Solstice 2.4L No Start, MIL Lamp on VIN: 1G2MB33B26
Hello everyone the car finally fixed the problem was in the cable harness: since this car did not have abs originally. After they install the new harness the abs connection jast hanging luse the can line was open in the harness after bypassing 4 wires ups car... Trouble codes: U2105, B3055, U2113, U2107.
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