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Prev Professional Automotive Repair Technical Discussions for August 21, 2007
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2001 Buick Regal LS 3.8L cruise control VIN: 2BGW5446L1
hello,we have this buick with c/c inop.have pwr.& grnd. to servo but no set or off on signal.i'm thinking a bad multi function switch,just wondering if anyone knows if this is a common problem or not as i am not very familer with cruise control. thanks in adva...
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1992 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK14KBN
Hello everyone, This truck came into my shop yesterday with a no start problem. If you try to start it normally it will not start, because it is not spraying any fuel. If you supply fuel through the throttle body it will start everytime and run for as long as...
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1992 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCEC14Z9N
Help Chevy guys! Vehicle was towed in for a no start problem. Check fuel pump relay and fuse. Fuel pump not turning on...replaced fuel pump. Still no start. Replaced fuel pump relay. No start. Hooked up scanner, no communication. Tested fuel injectors...right ...
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1996 Chevrolet C1500 5.7L starter VIN: 1GCEC14KOR
Hello, this truck will not crank.When you turn the key to start it, the solenoid clicks rapidly like a dead battery. The owner tried to repair it himself, and replaced the starter, battery, and batery cables with GM parts. We have tried running an extra ground...
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2001 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK52841
vehicle CAME IN W/ MULTIPLE EVAP CODES. WE HAVE REPLACED MAF, GAS CAP, CHARCOAL CANISTER, EVAP PURGE SOLENOID, VACUUM SWITCHING VALVE ASSY, & PERFORMED UPPER PLENUM CLEANING. VEHICLE HAS RETURNEED W/ MIL LAMP ON & CODE # PO441. ANY SUGGESTIONS OR HAVE WE JUST ... Trouble codes: P0441
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2002 Chevrolet Monte Carlo SS 3.8L door locks VIN: 2G1WX15K72
Customer brought vehicle in because security light on dash is on & door locks inoperative. Vehicle came in with codes B3128 (driver door unlock output short B+) & B3247 (trunk motor circuit low). Check fuses-BCM fuse was open. Replaced fuse & door locks work p...
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2002 Chevrolet Avalanche 1500 5.3L speedometer VIN: 3GNEK13T32
This vehicle came in with no speedometer, staying at zero. Scanned pcm and found p0608 speed output fault. Pcm showed vehicle speed on scanner but EVO, BCM, etc. showed no speed. Scoped the output on pin 50 of connector 2 at pcm and saw a square wave that was ...
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2002 Chevrolet Impala LS 3.8L low tire warning VIN: 2G1WH55K72
Hello all GM fans I have got here in my shop this impalla that keep setting the low tire warning, all 4 tires are up to pressure according to the door sticker. We clear this message with the tech 2 and in a course of about a week the message returns and all th...
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2004 Chevrolet Astro 4.3L Hesitation, Misfire VIN: 1GCDM19X64
thanks in advance hope you all can help me with this one. Vehicle misses and hesitates cold, sometimes popping through intake, you can feel this thing miss after sitting for 1/2 hour also. problem only happens from idle to 1500 rpm. and lasts usually for 10 mi... Trouble codes: P0300
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2007 Chevrolet Equinox LT 3.4L A/C permission withheld VIN: 2CND163F57
A/C not blowing cold, no compressor engaugement. Ambient Air Temperature/ Outside air temp., sensor reading 29 degrees F. on TECH2. A rat got into this vehicle and chewed the wiring harness to the fuel pump module and rear a.b.s. wheel speed sensors. Repairs w...
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2008 Chevrolet Uplander LS 3.9L back up alarm VIN: 1GNDV23W98
we have 15 of these to install back up alarms on.the problem is,when you lock and unlock doors with remote,back up lights and headlights come on. my question is,is it possible to turn this feature off?
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1994 GMC Safari SLE 4.3L No Start VIN: 1GKEL19W1R
I have no injector pulse using noide test lite. Scanner will not rear rpm (9999). There is no crank sensor for tach pulse. Tach pulse comes from module. Have checked for tack pulse at ECM 430 terminal with scope and have good signal. Have tried a used computer...
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1995 GMC K1500 Sierra SL 5.7L stalling when warm VIN: 1GTEK14K9S
This vehicle was brought over to me. Once it warms up the idle seems to pick up and then it stalls. I notice once the idle picks up the fuel trim goes down to 88 then stalls. It puts a code 33 which is a map sensor code which is high. Tried another map sensor,...
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2002 GMC Sierra 1500 HD SLE 6.0L steering VIN: 2GFTFK69U6
Thanks in advance. This is a quadrasteer and customer is complaining of an clunking noise from the right rear only when the quadrasteer is on. i have heard the noise and and it is a intermittant clunging noise when you make a sharper turn to the right in forwa...
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2003 GMC Yukon XL 1500 SLE 5.3L Accessories VIN: 3GKEC16T73
Front passenger door window,mirror and remote locks for all doors not working. Located Passenger Door Module needs to be reset and reprogrammed for this issue, I will enter what I found in the fix for this problem.
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1989 Oldsmobile Delta 88 Royale Brougham 3.8L speedometer VIN: 1G3HY54C5K
The speedometer and odometer do not work at all. The speedometer is stuck on 45 MPH. It is NOT digital. It does not have a speedometer cable. I checked the v.s.s. at the ECM at the purple and yellow wires and it has correct volts and hertz and corresponds with...
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1990 Oldsmobile Cutlass Ciera SL 3.3L No Start VIN: 1G3AM54N8L
Yes i know a few of the injectors are bad but thats not what i'm writing about. I am getting positive volts to both of the wires on each injector. We tried to isolate by unplugging them and testing individually, we still got 11.8 positive to each wire at all t...
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1997 Pontiac Firebird 3.8L No Start, INTERMITANT NO START VIN: 2G2FS22K2V
we can't get the symptoms to duplicate, has any one else seen this?
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1998 Pontiac Grand Am SE 3.1L shift interlock VIN: 1G2NE52M7W
car towed in. tested grounds, and found no high amperage draw on circuits. fuse won't blow for me. car left and blew fuse within five miles. please help. any ideas or common problems with these to at least point me in direction. transmission solenoids, a/c rel...
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2002 Pontiac Bonneville SLE 3.8L air bag VIN: 1G2HY54K32
This Bonneville is setting an air bag code B0101. I think the EFS needs to be replaced. My info system makes reference to a missing NOK signal from the EFS setting the code. What does NOK stand for? My Mitchell doesn't tell me and I haven't found reference to ...
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1995 Saturn SL1 1.9L Stall, no tach at times VIN: 1G8ZG5289S
Hello fellow technicians!! This saturn is giving me some problems and hoping you all can help. I have a code 19 with an intermittent stall and no tach read out. I have gone over this entire circuit several times. As far as I can tell, from the diagram I have f... Trouble codes: 19 (Ignition control 6x signal fault), 83 (low coolant switch open)
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2004 Saturn Vue Red Line 3.5L awd VIN: 5GZCZ63404
Vehicle will shudder in parking lot turns and has a very pronouced similar cabin buzz at 1200-1500 RPM's at cruising speed. Feels very much like an AWD viscous coupling shudder, or torque convertor shudder. Cannot find any looseness in shafts, couplings, mount...
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Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Seville STS 4.6L No Start VIN: 1G6KY5495X
hello everybody, sorry it took so long to reply with what i found out. called a friend at gm dealer he said to leave key on for about an hour that should do it. i explained that i did the key learn process (30 mins. on - 10 secs. off, 3 times) he said that som... Trouble codes: B2955 (key code input short to battery).
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1999 Cadillac Seville STS 4.6L engine VIN: 1G6KY5491X
Tested for hydrocarbons in radiator with warm engine goosed the throttle and it showed up. Bid the job and customer decided to trade the car off
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1987 Chevrolet Camaro Z28 Iroc-Z 5.7L converter VIN: 1G1FP87F8G
Thanks for all the HELP!!! Special thanks to Lane,Jeffrey & Joe,the vss sensor (at the back of the speedometer head)had a glitch in at 30 to 38 mph.Butch,Sam,Edward were correct now with the new vss tcc lockup is at 43 to 45 mph with light load. Thanks for...
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1995 Chevrolet Monte Carlo LS 3.1L trans VIN: 2G1WW12MXS
THANKS GUYS I AM NOT A TRANS SHOP NO SPECIAL TOOLS. FROM U GUYS IT SOUNDED INTERNAL. SO REPLACED WITH USED UNIT. THANKS AGAIN
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1996 Chevrolet Lumina LS 3.1L shift quality VIN: 2G1WN52M8T
I will post somewhat of a fix for this car. Not a proper fix, but it is all the customer would allow. Thanks for the replies. The replies mentioned TPS, Trans. Range Switch, Brake Switch as the most common reasons for the TCC lock-unlock problem. I did check t...
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1997 Chevrolet Blazer 4.3L Air Bag VIN: 1GNDT13WXV
We determined that the DERM was at fault as our poor readings persisted even with the airbag/clockspring and Arming sensor both disconnected. Replaced it and the system is back to normal. I can see where the Arming sensor could be a problem as they are located...
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1997 Chevrolet Blazer 4.3L Hard start VIN: 1GNDT13W7V
I would like to thank all who responded but unfortunately few replies really addressed my basic question of: If the fuel pressure drops to zero seconds after reaching correct PSI during KOEO testing, how can I determine if it is the pump check valve or the reg...
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2000 Chevrolet Malibu LS 3.1L instrument cluster a/c door lock & windos VIN: 1G1NE52J5Y
thanks to everyone that replied...99% of you said it was the ignition switch & you were right. got it to act up and made sure it as getting voltage & it was. changed it & its FIXED!!! thanks alot!!!
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2000 Chevrolet S10 4.3L fuel lines VIN: 1GCCT19W9Y
thanks for all the replies. after stepping away from the truck to post this problem, I decided the only way the lines were going in was to try placing the orings in first.they finaly went in. no leaks. one reply to unbolt the lines near the tranny was the key ...
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1998 GMC Safari SLE 4.3L system/ accumulator VIN: 1GKDM19W2W
First, thanks to all who offered help. Many great suggestions. Here is my logical test. I first made sure I had a good charge. I pinched off the rear AC unit to see if the TXV was allowing more juice through than needed. No changes in the guage reading. I emp...
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1995 Pontiac Grand Am SE 2.3L oil pressure VIN: 1G2NE55D7S
Lots of replies, and I'm really thankful for everybodies contributions. I had found a couple examples of simular issues of this in IATN, but was unsure due to slightly different circumstances. So the customer OK'd it and I took off the head, then ran into ...
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