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Prev Professional Automotive Repair Technical Discussions for November 3, 2009
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L Electronic VIN: 1G4HR52K4V
With the fan on it only blows out the defrost and alittle on the floor no midlevel. Iv'e been told that the hvac controller is a common problem on these vehicles but with the price I would like some afirmation that it is indeed a common problem. Also I need to...
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1985 Cadillac Seville 4.1L shift VIN: 1G6KS6987F
this is to all cadillac trans. pros. got this seville that when u put selector to R or D, the engine stalls. i suspect the tcc solenoid, but not sure. anybody out there with some knowledge on this before i start replacing the solenoid. customer was complining ...
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1996 Cadillac Seville SLS 4.6L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G6KS52Y0T
Hi All Cadillac Geru's and anyone who has a idea about Northstar motors. Customer concern was low oil light coming on and Stop Engine Light Now, coming on. Also had Check Engine Light on. After looking at oil filter adapter several times, felt take out plug on... Trouble codes: P0307 (Cylinder 7 Misfire), P0741 (Torque converter clutch off), P1377 (Timing error), P1406 (EGR error)
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1999 Cadillac Seville STS 4.6L door locks & switches VIN: 1G6KY5492X
I road tested vehicle today and while driving, the dash would "BING" and message came up "Left rear door ajar" then I looked back at door and the switch for heated seats was on LO. I tried shutting if off but switch would not work. Tried the lock switch on tha...
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1990 Chevrolet Corvette 5.7L ABS light on VIN: 1G1YY2381L
Abs light comes on every key cycle. While backing out of shop, put trans from rev to drive, move forward 1 or 2 feet, Heard abs pump motor cycle on twice then light came on. same codes. I am looking for a direction to go as vehicle has so few miles, it doesn't...
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1997 Chevrolet K1500 Silverado 5.7L Front Differential VIN: 2GCEK19R5V
When I engage the 4WD, the light on the switch flashes, indicating no engagement. The transfer case motor is shifting properly into high and low range and the front drive shaft spins. I can manually engage the front diff. with the electric actuator removed so ...
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1999 Chevrolet Express 3500 7.4L Poor Idle Quality VIN: 1GBJG31J4X
This van came in with a surging idle. We can not get the codes to reset. It will intermittently idle down to 400 rpm and then idle up to 950 rpm. The o2 sensors will cycle from 65mv to 855 mv. It will also randomly miss on all cylinders with the counts never e... Trouble codes: P0171 (lean fuel), P0507 (iac high rpm)
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1999 Chevrolet Blazer 4.3L valve train VIN: 1GNDT13W1X
we got this car as a no start. no compression on driver bank of cylinders. upon pulling pushrods noticed valves were being held open. with no pushrods, cylinders all suck and pressurise with finger in plug hole. pushrods are correct length by spec. has anyone ...
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2000 Chevrolet Silverado 1500 4.3L No Start, ignition module VIN: 1GCEC14W3Y
Let me thank everyone in advance for checking out my puzzler. Sorry for the long post. I am looking for an answer as to why this truck keeps eating ign modules.Any ideas will be appreciated. I've gone pretty in-depth in my diag and only found a couple of thing...
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2001 Chevrolet Silverado 3500 8.1L valvetrain ?? VIN: 1GBJK39G91
This 3500 truck has a distinct rattle (sounds like valvetrain) from RH bank, starts at about 1500 rpm, quiets back down at about 1900 rpm. Changed oil & filter ran engine to operating temp with "BG quick-clean", drained oil, changed filter, refilled with "BG M...
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2002 Chevrolet Avalanche 1500 5.3L ebcm VIN: 3GNEC13T52
We need some real diag help on where to go from here. Does anyone have any suggestions on what to do next any help would be greatly appreciated.
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2002 Chevrolet Silverado 2500 HD LT 8.1L shifting VIN: 1GCHK29G12
Well I'm not to much up on these allison trans problems so all help is greatly appreciated. When the vehicle is cold and sits outside the trans will make this buzzing sound almost like the pump is cavitating from cold fluid. This morning I went to drive it and...
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2006 Chevrolet Uplander 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDV23L86
This van has a misfire at idle when warmed up. Scan tool shows cylinder #6 misfiring when problem occurs. sparkplug replaced, wires swapped, fuel injector checked for resistance & spray pattern. scoped all injectors with low amps probe - all show good! Vacuum ... Trouble codes: P0300 (random misfire detected)
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2007 Chevrolet Silverado 2500 HD LT 6.0L Starting VIN: 1GCHK23U87
customer complaint truck sometimes will only crank and wont start, later it will finally start. as i recall this should have a chipped key and could also allow not to start at times, or if you have any other ideas. i have started it 50 times with no problems
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1989 Oldsmobile 98 Regency 3.8L No Start, Cuts out VIN: 1G3CX54C8K
Owner called and said vehicle just shut off as he was driving. Vehicle re-started and he drove home with it shutting off 2 more times. Towed vehicle to shop and started diagnostics. Fuel pressure was low in band so replaced pump and filter. Vehicle started and...
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2001 Oldsmobile Intrigue GLS 3.5L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on, no start VIN: 1G3WX52H41
came in on hook no start acted like it was flooded removed plugs and found soaked in gas.replaced started but ran rough misfiring on 2/3/4/5/removed fuel rail and vis checked inj looked ok checked fuel pressure ok removed and swapped coil packs no change.spray... Trouble codes: P0300
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2002 Oldsmobile Intrigue GL 3.5L headlights, radio VIN: 1G3WS52H32
Good Day All and thanks for your time. I'm working on a 2002 Olds Intrigue. The problem is when you remove the key and exit the vehicle, the headlights and radio stay on. The only way to power off the radio and lights is... hehe to scroll the dimmer switch fo...
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2000 Pontiac Grand Prix GTP 3.8L Surge VIN: 1G2WR5211Y
This vehicle surges up and down 200 rpm at idle in park intermittantly. Checked for vacumn leaks and intake leaks and hg leaks, Found none. Cleaned and checked maf, Checked data and when it is surging the Iac is moving back and forth is that normal Checked fue...
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Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Regal Custom 3.1L No Start, Stall VIN: 2G4WD14T7L
thanx to all who replied. it was the injectors one measured 4.4 ohms another was 6.[...] out the bad ones and runs like a champ. i would've never looked at the injectors without the help of iatn thanx again.
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2000 Chevrolet Silverado 1500 LS 5.3L encoder motor VIN: 1GCEK14T8Y
WE HAD TO REPLACE THE TCCM ONCE WE FOUND OUT HOW TO GET IT OUT, WE FOUND THAT ONE OF THE RELAYS WOULD NOT MAKE CONTACT WEHN ENGAGED. A WEEK LATER THE 2ND REMAN ENCODDR MOTOR WAS STUCK IN 4 LO. SO WE REMOVED THE TRANSFER CASE AND DISASEMBLED TO INSPECT FOR...
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2004 Chevrolet C4500 Kodiak C4V042 6.6L MIL Lamp on, trans. in fail safe VIN: 1GBE4C1235
sorry for the delay, i wanted some time on the road to confirm the repair, we scoped the signal from the input speed sensor while running and running the p t o , the signal gets wide but stays consistent, we re-flashed the p c m , and seems to have fixed the p... Trouble codes: P0716, P0717.
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2004 Chevrolet Suburban 1500 Z71 5.3L MIL Lamp on, VIN: 3GNFK16T24
I WOULD LIKE TO THANK ALL OF THE INPUT ON THIS ONE. AFTER MULLING OVER THE ALL OF THE REPLIES, MOSTLY EVERYTHING ALREADY TRIED, THE GM DEALERSHIP THAT WE HAVE BEEN BUYING THE EVAP COMPONENTS AND PARTS PERTAINING TO THIS SITUATION, THE PARTS PERSON CALLED US BA... Trouble codes: P0446, P0442.
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2007 Chevrolet Avalanche LS 5.3L ABS mudule VIN: 3GNEC120X7
Thanks to all who replied to my request.. yes it you were wright... But what i did was plug the old module in and the light went out. Since the hydraulics side was good now I put the old module on, and fix the problem...with the check engine light... thanks ...
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2001 GMC Sierra 2500 HD SL 6.6L 2nd to 1st gear downshift VIN: 1GTHK29191
The suggestions emailed to me did not fix my problem. We will have to completely overhaul the transmission and we were trying to avoid that as much as possible. Thank you to all who emailed suggestions! Chuck
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2001 Oldsmobile Intrigue GL 3.5L engine coolant VIN: 1G3WH52H01
Well this job is going BACK together. After the replies(2were helpful,2 were not) I decided to heat the crossover pipe and dent where 2 bolts were hitting at places in the crossover.After about 1 hour of heating and driving punches between the bolt head and cr...
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2006 Pontiac G6 3.5L Mechanical VIN: 1G2ZG55826
Well it turned out to be a wheel bearing. I stripped the brakes off so that I just had the hub. You could hear the noise is the left hub, I think it was transferring the noise to the trans through the axle. Just to be sure I swapped bearings side to side. Th...
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2002 Saturn L200 2.2L Stall, no security lamp VIN: 1G8JU54F22
sorry guy's out there most everyone said no matter what part it was it had to be flashed or reprogrammed any way so i advised costumer to take to the dealer Trouble codes: U1000 (serial comm), P1599 (testing and results).
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