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Prev Professional Automotive Repair Technical Discussions for October 28, 2005
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L starting VIN: 1G4HR52LXR
i am trying to find out how to by pass vats system with resistor. i called dealer, i have code 9 key resistor. what do i need to get for the by-pass, is there a chart for the key codes. had in mind going to radio shack and getting a resistor. thanks in advanc...
1994 Cadillac Seville SLS 4.6L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G6KS52Y4R
Vehicle brought in with running problem. Would kinda idle ok at times, but the second you touch the gas pedal it dies out. Found intake gasket leaking, so I replaced the gaskets. Found that the PCM someone else installed was for a 1995 with a different prom in... Trouble codes: 80 (System Rich)
1994 Cadillac Seville STS 4.6L Surge, MIL Lamp on VIN: 1G6KY5290R
Help!! Cadillac Techs!! The Demons of code 25 and code 83 are Possesing this Northstar!! The idle is erratic and surges- it will reset the code 25 first and if it runs for 2-3 minutes, it will also reset the 83. We scope tested both crank sensors and the cam s... Trouble codes: P0025, P0083
1999 Cadillac Escalade 5.7L start/stall VIN: 1GYEK13R8X
I have to tell you the whole story I think itís important, Iím the second owner, had 30k miles when purchased. Had no problem until I [...] to New Orleans july1 04. I was ready to leave this Saturday am and it will start then die repeatedly, after 1.5ho...
2000 Cadillac Catera 3.0L No Start, Hesitation, Stall, MIL Lamp on VIN: W06VR54R0Y
please help! i have this cadilac that will stall and will not start at times. and sometimes it will just not start at all. also the trans will go into limphome mode. sticks itself in 4th gear.and the trans light on dash will has done all symptoms at o... Trouble codes: P0455, P0703, P0727, P0140, P0160
2002 Cadillac Escalade 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GYEK63N02
Hi guys, got a strange one here. Vehicle came in with history codes p0102, p0171 and p0174. Has already been to dealer twice. I verified the wiring repair over the front drive shaft. They did an excellent job. At some point the wiring had shorted out blowing t... Trouble codes: P0102 (low maf frequency), P0171 (fuel system lean), P0174 (fuel system lean)
1988 Chevrolet C1500 Cheyenne 5.0L Mechanical VIN: 1GCDC14H2J
Hi everyone, have chevy truck with brake trouble. Feels like doesnt want to stop, been doing this for a long time but came in shop with no pedal. Brake line rusting into along frame rail. droped fuel tank replaced entire line, front pads and rear brake shoes.t...
1990 Chevrolet K1500 Cheyenne 5.7L cooling system VIN: 1GT0K14K5L
Truck had a head job done 2 yrs ago it lasted for about a year he went back to the same placxe and they replaced it again showing him the right headgasket. The customer stated that the gasket was severly detiorated from heat. At the the time his temp gauge did...
1990 Chevrolet K1500 Cheyenne 5.7L Surge, Cuts out, bucks, jerks VIN: 2GCEK19K6L
ok folks put your thinking caps on for this one. 1990 k1500 5.7l extend cab pickup. customer states when driving and using either headlights or turn signals vehical wants to cut out and die. test drove and verified the compalint:(..yep when i was driving @60mp...
1992 Chevrolet C1500 Cheyenne 5.0L No Start, Cuts out, Stall VIN: 1GCDC14H3N
1994 Chevrolet C1500 Cheyenne 4.3L Inop 3rd & 4th gear VIN: 1GCDC14Z7R
This one has me stumpted. The orignal customer compaint was that the truck would not go over 40 miles per hour. The transmission was toast so we had it rebuilt. The builder said the 3rd and 4th clutches were nothing but metal shims and all of the clutch materi... Trouble codes: 24 (No VSS signal), 72 (No VSS Signal)
1997 Chevrolet K1500 Cheyenne 5.7L drive line VIN: 2GCEK19R1V
This truck develops a vibration at 60 mph and above only on accelleration. If you dont accellerate hard, it won't vibrate. It feels like drive line. You can make the vibration come and go by pushing on the accellerator or letting off. It will do it in 3rd or o...
1997 Chevrolet K2500 7.4L Poor Idle Quality, Misfire VIN: 1GTGK29J2V
Hi technicians, thank you for your help. This vehicle came in a couple weeks ago with a rough idle when cold. Found injectors leaking down. Replaced leaking injectors and vehicle started fine cold the next day. Customer came back after about a week and a half ...
1999 Chevrolet Cavalier 2.2L head gasket? VIN: 1G1JC1243X
Car came in complaint was ran hot lost coolant. Replaced the stat, topped off the coolant made sure the fans ran, drove it a bit. Car was good. Came back a week or so later. Same story. Check cooling system for exhaust gas, hc was over 2000 with traces of co2....
1999 Chevrolet Astro 4.3L No Start VIN: 1GCDM19W5X
Listen to this nightmare, replaced this Astro engine with used from 99 s10. Transferred intake and a few accessories. Now it won't start. It sounds like it is out of time, but I am sure distributor was put back in the exact same spot. Dist cap and rotor were c...
2001 Chevrolet Astro LS 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDM19W11
hello everyone, we have this astro van that came in with a no start,we replaced the cap rotor and wires due to misfiring and wetness under cap.van started but runs on only 3 cyls.cyls #2,3 & 5 are not working.customer had no other problems before no start.we h... Trouble codes: P0300
2005 Chevrolet Cavalier LS 2.2L torque pull VIN: 1G1JF14F75
Vehicle was in minor collision in front. Replaced upper tie bar rt headlamp, frt cover etc... no structural or suspension damage. A 4 wheel alignment was performed - Lt camber: -1/8, Rt camber: +1/8, Rt caster: +3 1/2, Rt caster: +4 Toe: 1/32``. Rear: camber b...
1997 Geo Prizm LSi 1.6L Left Rear Brake VIN: 1Y1SK5261V
Hello, After we did a rear brake job, this car has a knocking in the left rear wheel that shows up when you brake moderately hard from over 30mph. The knock increases in frequency with more road speed, in other words, the faster you're going when you step on ...
1998 GMC Jimmy SL 4.3L Fit & Finish VIN: 1G2FR365XS
there is a clunk coming from the right front while driving over washboard surface roads .the right front tire has to be on the rough patch of road for this to happen.we have love for all obvious causes to no evail.this is a 4x4 jimmy by the way.
1998 GMC Jimmy Envoy 4.3L Temp Control VIN: 1GKDT13W0W
I have been pulling my hair out on this one! Came in with complaint of Full Heat at all times. Codes B0408 (Temp Control #1 (Main) Circuit, B0415 (Temp Control #1 Circuit Low (Feedback Circuit Low))and B0416 (Temp Control #1 Circuit Low (feedback Circuit High...
2004 GMC Envoy XL SLT 4.2L check four wheel drive lamp VIN: 1GKET16S84
after extended trip 200 to 300 miles owner returns home and parks suv. after cool down of one to two hour on restart check four wheel drive lamp comes on and dial for the four wheel drive goes blank. system drives normal. on next start all is ok. no codes stor...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L trans solinoid's VIN: 1G4GD22135
Ok the battery thirmister fixed the car!!! the alt is now charging at 14.5 volts. One other thing I should have mentioned is that the problem I was having was only happing at peek alt voltage. The miss would happen when the alt reached 17.5 volts.Also the alt ...
1995 Cadillac Seville STS 4.6L Poor Idle Quality VIN: 1G6KY5298S
Problem with this vehicle turned out to be a head gasket, i did a hidrocarbon test on the radiator reservoir and shure enough i had 450ppm at start up, the other test i did was preassurize the cooling system and checking each cylinder with a boroscope and afte...
1990 Chevrolet Corsica LT 3.1L Late Shifts VIN: 1G1LT54T3L
Well it's fixed. Most replies refered to a throttle pressure problem. Either a worn throttle pressure control valve worn or a cable out of adjustment. It ended up being a cable adjuster that would slip and allow the cable to come out of adjustment. Put on a ne...
1994 Chevrolet Astro CL 4.3L Excessive Emissions, Poor Idle Quality VIN: 1GNEL19WXR
i performed a fuel leak down test and it dropped of right away , contacted customer told him would need to remove the plenumm to check for fuel leaks he did not have the finances at this time. I really appreciate everybodys replys i do believe it is the fuel s...
1997 Chevrolet C1500 5.7L Transmission VIN: 1GTEC14R9V
Hi Guys, This one is out the door and fixed. I was pretty sure the noise was coming from the converter/pump area and that is what most of you suggested. I did have a couple mention flexplate problems but my thinking is that that type of noise wouldn't go away ...
1997 Chevrolet S10 2.2L Starter VIN: 1GCCS1440V
Thanks to the guys who helped with my request. They were all great suggestions. Vehicle came back and customer said fuse blew out again. Put fuse in and vehicle started great, for 6 times then started making noise. Listening closely, it sounds like starter is ...
2002 Chevrolet Impala 3.4L fuel guage VIN: 2G1WF55E12
Thanks again IATN Folks we are Batting a thousand. It turned out to be the sending unit as suspected. The Follow up test that were recommended took the Guess work out of the diagnosis. Thanks Mike Cox
2003 Chevrolet Trailblazer LS 4.2L front of engine VIN: 1GNDS13SO3
Thanks to all that responded. As most everyone noted the noise is coming from the fan clutch. We performed the computer reprogam as per T S B and thought it was fixed but customer called back a few days later and said the noise was back. We are trying to get h...
2003 Chevrolet Impala LS 3.8L Wheel Bearing VIN: 2G1WH52KX3
Thanks to all that replied.(Tried to answer all personally,but I had slight problem with my E Mail).Responses ranged from 'noise travel'(other side we have all seen that!)to other steering system components. A few guys said possible tire problem. That was it! ...
1996 GMC K1500 Sierra SL 5.7L No Start VIN: 1GTEK19R6T
Tons of feedback on this problem and I thank everyone of you. Majority said the connectors melt where wires enter fuel pump hanger. Removed pump and inpsected all looked okay, but back to basics again! Tied a 12 volt test bulb at the inside connecotrs and it w...
1998 GMC Savana 3500 6.5L signal lights VIN: 1GDJG31F9W
Found some one had jointed lt turn signal light to rt tail light under drivers seat. This was at another shop and they spent days on it. thanx for the help.
1994 Pontiac Firebird 5.7L Headlights VIN: 1PABP23X6G
the only information I got that was somewhat related was to look at the headlight switch and it's o.k.
1999 Pontiac Grand Am SE 3.4L tcc solenoid VIN: 1G2NE52E9X
after alot of testing it ended up being a broken wire (brown wire) at trans connection. it was the wire coming from the tcc solenoid going to the pcm. it had come apart inside the connector right at the trans. thanks to all that had replied. eric
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