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Prev Professional Automotive Repair Technical Discussions for October 3, 2008
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L starting running VIN: 1GH4HP52KX
Hello.I could some help with this one.This car dies while driving on average about a week.It will restart anywere from 20 seconds to 20 minutes.The only other thing that does not work are the power windows.It cranks but wont start.By the time the car gets back...
1996 Cadillac DeVille 4.6L No Start VIN: 1G6KD52Y7T
This vehicle was having problems with the transmission, they replaced it, then it will turn but won't start, somebody told them to replace the pcm, so they replaced the pcm, and then it won't even turn, so they brought it to me, i did put back the old pcm in i...
2001 Cadillac Seville STS 4.6L Low Beam HID VIN: 1G6KY54921
We want to confirm the repair on a HID low beam on this car requuires the Igniter/ bulb and the harnass and the ballast. This repair is over $1100 just for the parts. Please confirm
1971 Chevrolet Chevelle 502CID Pinging VIN: 1D37H2B587
Try to set Timing at 8 deg btdc and with 30 deg total advance and motor will hardley run and spit through the carb, if I set base timing to 35 to 40 deg btdc with no advance hooked up it runs great has plenty of power but pings under hard accel decrease timing...
1984 Chevrolet C70 366CID low power under load VIN: 1GBG701B4E
This truck is an old Coca Cola semi tractor that's been made into a pickup truck and is used for livestock transport. This truck runs well until loaded with approximately 16k worth of livestock and trailer.At 10k it runs well. Once it gets warm it loses power...
1996 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 3GNFK16R9T
SES light intermittent p0300. Can not feel it, but can watch misfire monitors. All cylinders will show mis at random, but primary cylinders 2&3. We have ran relative compression test is even. Have blocked off EGR valve to eliminate. Cam retard at 0. Trouble codes: P0300
1997 Chevrolet Corvette 5.7L ABS light on solid VIN: 1G1YY22G5V
Replaced evaporator core and a/c compressor.ABS light came on after start up.Pulled code B 1061 lamp circuit failure.B1061 chart directed me to sdm integrity check which flagged the sdm module defective.I had to remove the module and the passenger air bag to r...
1997 Chevrolet Astro 4.3L No Start VIN: 1GNDM19W0V
PLEASE READ BEFORE RESPONDING WITH SOMETHING I ALREADY CHECKED. THANKYOU IN ADVANCE! This van came to me from a machinest friend of mine. It was a no start about 2 months ago in his driveway. He called me asked for help thought it was an injector. Got it towed...
1997 Chevrolet Express 3500 6.5L Hesitation, Surge, over rev high excel VIN: 00V1088711
sorry guys to be a repeat on this one but it came back in today with the complaint of hesitation, buck and high rev! well it's more of a very sensitive pedal i would say! 3% of throttle intermittently causes the motor to over rev and on the highway it will buc... Trouble codes: P1216
1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality VIN: 3GNFK16R2X
THANKS IN ADVANCE this suburban idles rough - not really rough but every 3 months or so it will throw a po300. this time the misfire monitors were hi on 7, 3, and 4. 1234-2344 misfires. Freeze Frame is recorded at idle. i can drive this thing down the road and... Trouble codes: P0300, P0420
2001 Chevrolet Blazer LS 4.3L Hesitation, Surge VIN: 1GNDT13W71
Thanks for any replies in advance.I have a 2001 chevy blazer with a 4.3 v6.Customer complained there was a hesitation at low speed and then ok after about 2000 rpm.Scanned for codes,none found.Engine idles great,What I have noticed is after the 1-2 shift it dr...
2004 Chevrolet Classic 2.2L No Start, NO NOID VIN: 1G1ND52E14
This car has come into the shop on a tow truck several times and every time except once it has started right up. The one time it failed while checking it seemed that the PCM was not sending ground to the injectors. But when we pulled the PCM down to perform a ...
2005 Chevrolet Silverado 1500 LS 5.3L Electronic VIN: 2GCEK13T25
Service 4WD light comes on and off. Lights come on the dash indicating 4 HI or Low when vehicle is not in 4WD. Scanned for codes a found code po327 in history. Installed new switch which obviously did not correct problem. Traced a little further and found that...
2006 Chevrolet Express 2500 4.8L No Start, Stall VIN: 1GCGG29V46
Vehicle in for crank but will not start. Customer commented that security light flashing as symptom is occuring. On going problem for vehicle since new. ***But--- only happens or occurs at this time of year.. The codes found in pcm were not current and initial... Trouble codes: 171 (lean o2), 174 (lean 02), 336 (crank sensor)
2008 Chevrolet Avalanche LT 6.0L drive train VIN: 3GNFK12Y18
The vehicle when going 60-63mph goes from V8 mode to V4 mode has what feels like a drive train vibration.When you step a gas slightly it goes back to V8 mode and vibration is gone. It also does it at other speeds but is worse at given speed.Has anyone had this...
1998 GMC K1500 Sierra SL 5.7L No Start, Stall VIN: 1GTEK19R8W
This pickup came in with an intermittent stall.We found that anytime it was driven for more than 20 minutes it would die and not restart for 5-20 minutes.We always get a hot spark but no fuel pressure.We installed a new pump but the problem persisted.The vehic... Trouble codes: P0452 (fuel tank pressure sensor low)
1998 GMC Jimmy SL 4.3L tcc pwm VIN: 1GKDT13W25
Well just wanted to run this by you all, the code 1860 resets as you come to a stop, most of the time, sometimes it will set at 35 to 40 mph with convertor locked up. Test drove with volt meter on the control side of the tccpwm sol. Have battery voltage at idl...
2000 GMC Sierra 1500 SL 5.3L fuel tank VIN: 1GTEK19T5Y
hello and thanks in advance; as stated about 6 months ago i replaced the fuel pump assy. and have had no other problems until recently , the customer reports that when filling the gas tank that it will not take fuel fast the pump handle continues to click off ...
1996 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE52M8T
hello all, are we ready for another gm passloc problem. vehicle came in to shop as a cranks no start at times. scanned system for codes and had code # p1629. replaced lock cylinder and vehicle started on first try.ran relearn procedure and now have intermittan... Trouble codes: P1629 (theft fuel enbale-incorrect/no signal)
2001 Pontiac Grand Am SE 2.4L timing chain VIN: 1G2NE12T41
Let me try this again with the correct VIN (originally posted with another pontiac I had in the shop ... idiot)Didn't have much luck in archives , but let me run this by you . Put in a new water pump , chain , guides, sprockets, and tensioner and we're getting...
2002 Pontiac Grand Prix SE 3.8L ignition key VIN: 1G2WP12KO2
Customer complaint is not being able to turn key off into lock position for removal. This is an intermiten problem. Using solus pro the gear shift lever is reconised as being in park. When the current is flowing correctly the solenoid works just fine. After re...
2000 Saturn LW2 3.0L timeing belt VIN: 1G8JW82R8Y
I want to say thanks for the help first. this car came in over heating.we did valve job.can not find the right timing marks.has 2 per gear. They do not tell witch one to use.Does any one know witch ones to use

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L Cuts out, Stall, MIL Lamp on VIN: 1G4HP52L3R
This one was a tough one. It turned out to be a glitching MAF. we think the cam/crank codes was caused by a loose timing chain, that caused the cam to bounce when the engine cut out. if this code had not been set we would have had a much easier time of it. Tha... Trouble codes: P0341 (cam/crank error).
1997 Chevrolet Express 3500 6.5L Excessive Emissions, black smoke VIN: 00V1088711
thank you everybody on helping me out with this van! i check for vacuum and had none . took vacuum pump off and bench tested and it was bad! replaced the pump , decompression valve cleaned turbo and related part and boost again! the throttle is messed up becau...
1997 Chevrolet Cavalier 2.2L Anti Theft Deterent VIN: 3G1JC5249V
again i can't stress to my techs that if it worked befor you worked on it than go back and make sure of your work befor condemming parts of the system..in this case the 3 wire connector from the passlock plugs into the dash in a differant spot than the main mu...
1998 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52M4W
flipped around hoses on canister purge valve and car has not been back since.had it on right,flipped them around ,then flipped around again! should have just left it the way it was the first time! Trouble codes: P0440 (emission control).
2000 Chevrolet Express 2500 4.3L Misfire, MIL Lamp on, only at idle to 1800 VIN: 1GCFG25W8Y
I would like to thank everyone for there help, We tried the runing compression test. The #4cyl. only had 75 psi and two of the known good cyl. had 95 psi The fleet just wanted us to but it back together and they would run it till it dies. Again thanks for all ... Trouble codes: P0304.
2003 Chevrolet Trailblazer North Face 4.2L drivers door module VIN: 1GNDT13S43
Thanks for the help guys. Joel, Jason, Roger, Charles ans Alex all deserve the credit for this one as they were all 100% correct. We ended up sending it to the dealer for a DDM reprogram which did not work so they replaced and programmed a new one. Problem ...
1996 GMC Jimmy 4.3L tail gate release VIN: 1GKDT13W9T
i never found short so ran some new wires so tailgate opens ok,lites on inside work , drivers door window switch works on all windows. good enough for a use'd car thank's
1998 GMC Savana 2500 5.7L MIL Lamp on VIN: 1GTFG29R8W
well when it was all said and done the pcm was causing the problem new pcm and problem solved Trouble codes: P0121.
2001 Pontiac Grand Am SE 2.4L timing chain VIN: 1G2NE12T41
closing because of wrong VIN thus wrong motor , however Alex did run the VIN and gave some helpful advise on the 2.4 quad that was all checked again and ok . Now have a request using correct motor and VIN . Thanks all and Alex for your extra effort .
2005 Saturn Ion-1 2.2L idle speed fast VIN: 1G8AF52F85
Had 4 good replies, Michael from Illinois, Alek from Ontario, Larry from Ontario,Angelo from New Jersey.Thanks guys. Also Jim Watson from Identifix. I finally ended up going to local GMC/Buick dealer and let them put this Saturn on their Tech II. My Modis woul...
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