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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 19, 2007
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Open Help Requests for GM
Help Request Answers
1993 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP53116
this is a problem that keeps coming back to our shop. it has had 5 tps put on in 5 years. of the last 4 none lasted longer than 8 months. the last one we put on, wich was my turn at bat on this car, we changed from napa brand to borg warner. the borg warner ma... Trouble codes: 21 (tps high voltage in history), 22 (tps low voltage current)
1994 Buick Roadmaster Limited 5.7L Dash lights VIN: 1G4BT52PXR
dash lights and taillights will not operate with day time running lights operating. headlamp switch as been replaced...check tbs on condition but it doesn't apply to this problem
1999 Buick Regal GS 3.8L Maint. Light VIN: 2G4WF5219X
Customer came in with the "Service Vehicle Soon" light on and "Change Oil" light. We reset the oil change light by depressing the accelerator pedel a few times with the KOEO. The "Service Engine Soon" light is off. Double checked no codes. We are trying to res...
1999 Buick Park Avenue Ultra 3.8L noise VIN: 1G4CU521XX
hey all thanks in advance. got this buick that came in for a olf. upon pulling out i heard a thumping noise coming from eng. compartment. customer said fix it. it is a revolution noise. only in drive or reverse at idle. noise goes away with both belts removed....
1989 Cadillac DeVille 4.5L pcm VIN: 1G6CD5155K
Well this car came in for lack of power after driving for about half hour on several occasions. After replacing all ignition parts, alternator, pcm and battery, and checking all grounds I noticed that even tho tho battery is showing a steady charge, looking at...
1997 Chevrolet C1500 4.3L Fuel Gauge VIN: 1GTEC14W9V
This 1997 pick up has a fuel gauge that wanders from full to empty, and everywhere in between. More than just a little flutter. When driving and the gauge is somewhat stable and you turn your signal on, the gas gauge keeps time with the signal. Moving about a ...
1997 Chevrolet S10 LS 4.3L abs VIN: 1GCCS19X2V
replaced brake line to rear wheels and shoes and drums!!! can not get this thing to bleed, manually nor pressure!!! scan tool shows nothing for brake bleeding procedure any help would sure be appreciated!!! tim
1997 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JC1246V
Ok guys this one is about to drive us nuts and im not sure what to do from here. I am posting this from home for one of my techs. Here is the scoop. we put a head gasket on this thing. We got it together and it was running fine for at least 15 min or so and th...
1999 Chevrolet Venture 3.4L rear door VIN: 1GNDU06E8X
Morning iatn techs, Can someone out there tell me how on earth to get a rear door hatch open on these Venture vans? The handle works and I can hear the mechanism inside the the door moving. My assumption is that this is an electric latch? There is no way to a...
2000 Chevrolet S10 2.2L battery VIN: 1GCCS1442Y
hello techs,please help. 2000 chevy s10 came into our shop last wed. cust. said battery goes dead after setting a couple of days. battery was weak but tested ok after charging. alt output 98 amps checked drian on battery 39ma is as high a drain on system i hav...
2001 Chevrolet Suburban 1500 5.3L no powersteering VIN: 3GNFK16TX1
hello everyone, i could use some help on this one. truck came in with no power steering, so i pulled belt off and found broken shaft so i replaced pump with a reman, still no power steering i swaped over evo switch to new pump, i ckecked power at evo switch an...
2003 Chevrolet Express 2500 4.8L Starter VIN: 1GCGG25V43
This van has had the above noted new parts. After two weeks of driving it will NO Crank with the gear selection showing 2nd gear instead of park or N DTC 706. Clear code and the van runs for another two weeks. I have data stream values from today when this...
2004 Chevrolet Silverado 1500 5.3L speedo VIN: 1GCEK19T34
hi people i have this truck here that the speedo goes up to 115-120 mph when ever it wants it has no codes, the trans shift fine no drivabilty problems i check the two speed sensor they read fine when the problems happen. i know there is i problem with the clu...
1991 Geo Prizm 1.6L No Start VIN: 1Y1SK546XM
Hi Everyone it's my week to not be able to fix anything!This 1 came in on tow truck with no start.Checked for spark at plug none there.Check'd for sec.spark from coil none there.According to Nodata i ohmed the coil it was ok,did the ohmn tests for pick up and ...
2000 GMC 6500 7.4L No Start VIN: 1GDJ7H1D0Y
After engine install. Engine will crank for 5 seconds then starter disengages. There is no fire from the coils. I have 12volts and ground at every coil. I have injector pulse and tach signal at vehicle tach. Cam and crank signals show on scope for about 2 seco...
1991 Oldsmobile 98 Regency Elite 3.8L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1GC3W53L8M
Need help please.Have this olds that has an intermitent ses light that comes and goes.We put a cam sensor and magnet in it because the magnet had broken apart.this car seems to have the semptoms of a vacume problem but after a couple of hours of searching for ...
1997 Pontiac Grand Prix GT 3.8L headlights VIN: 1G2WP52KXV
Hello, This car is my personal automobile and it has me and my peers in awe! When the blower motor quite working on speeds 1-2 I went for my usual component! The blower motor resistor. After testing and confirming it was bad, I replaced with a unit from Napa,a...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Park Avenue 3.8L hard start VIN: 1G4CW52K3Y
hello all sorry it took so long to get back to yall we wanted to make sure this one was good before we sent in our fix thank you for all your responses we feel like a big dummy all we had to do was adjust the throttle plate i still havent figured out way the m...
1993 Cadillac Seville STS 4.6L No Start VIN: 1G6KY5294P
Well I had to bite the bullet and try the ignition module because everything kept pointing to the timing or the module out of time. I could not see just the timing chain to jump so I put on the new module and started like a champ Thank God. Trouble codes: 53 (4x refrence).
1991 Chevrolet Tracker 1.6L No Start, Cuts out VIN: 2CNBJ18V0M
I replace the ignition moodule on top of the coil and that has seemed to have solved my problem. We ran the vehicle all day ans it didn't stall or stumble. Thanks to all that responded.
1993 Chevrolet K1500 Suburban Silverado 5.7L Pedal drops VIN: 1GNFK16K1P
This one is not fixed, but I know what will fix it. The ABS control module is faulty, intermittently causing the hydraulic unit to release brake pressure. Testing the module confirmed that it was bad, but it could still have had a hydraulic problem. I disconne...
1999 Chevrolet Silverado 1500 5.3L door locks VIN: 1GCEK19T7X
sent truck to dealer. dealer was able to program new fob but was never able to get automatic door locks to work right. dealer said 'it's broke'. since customer was selling truck he was ok with this. tech 2 was the only way to program remotes.
2003 Chevrolet C4500 Kodiak C4C042 8.1L fail safe won't engage drive or reverse VIN: 1GBC4E1EX3
Ok short and sweet... the mlps (prnd switch)fixed all the codes I had, including the airbag and charging system ones and even the U1000 can bus communication errors... then having the proper fluid level made the unit engage gear properly thanks for the tips ...
2001 GMC C7500 8.1L no acceleration VIN: 1GDM7H1E71
Well I want to thank everyone who lended a helping sugestion, in my purchute to repair this truck. Boy do I know this system inside and out. I followed all sugestions up to and including running new grounds from the TAC module,and at the TAC motor with no luck... Trouble codes: P1515 (throttle range error), P0405 (egr).
1988 Pontiac Firebird 5.0L fuel system?
Thanks for all your help guys. got a chance today to disconnect the EGR and it didnt affect it. hooked it back up. next i tried to back prob the TPS to see if i had a dead spot but my 5$ DVOM wouldnt work right. so i started the car up, unplugged it, and it ra...
1996 Pontiac Firebird Formula 5.7L no Acceleration VIN: 2G2FV32P9T
Thanks for the replies. After an exhaustive search including visiting my friends at the pontiac dealer, I could not find any more info on this system. So I ordered a new one and began to figure out what the difference was. I now know how this contraption works...
2000 Saturn LS2 3.0L MIL Lamp on VIN: 1G8JW52R6Y
Thanks to all who responded to my request for help. When I posted my request, I gave short and long term fuel trim readings, but I failed to mention the engine load conditions while I was seeing these readings. I was actually seeing fuel trim readings at 25% o... Trouble codes: 171 (bank 1 lean), 174 (pending bank 2 lean).
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