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Prev Professional Automotive Repair Technical Discussions for October 4, 2005
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Limited 3.8L MIL Lamp on VIN: 1G4HR52L6R
I need some help. I have the car that is setting knock sensor code while the KOEO, this happens about one min. after I clear the codes. I have a good connection at the knock sensor W/ 2.46 volts measured at the ECM and 5Volts when disconnected. When the code s... Trouble codes: P0325
1994 Buick LeSabre Custom 3.8L hvac VIN: IG4HR52L9R
car came in with hvac not switches from hot to cold when put temp to 90 would blow cold air & put to 60 would blow hot air had code 0041 & 0052 also only blow out of defrost & heat not out of vent repalce programmer everythings works accept when you put on 60 ...
1995 Buick Park Avenue 3.8L Charging VIN: 1G4CW52K9S
Dash volt gauge red light always on. At idle & higher, in park, A/C & headlights on, 14V.(measured with voltmeter) In "drive" A/C and headlights on, reads 10V with 1 amp output. The more load the less volts in drive. Amps won't keep up. Red wire from computer ...
1996 Buick Regal 3.8L cooling fans
this vehicle came into the shop ac inop.i checked for codes.no dtcs.fuse for comp.was blown.replaced the fuse.can use the tech-2 to activate the ac relay.comp. cluch would engage.comp.was noisey.reclaimed the r134.removed the orife tube and it was filled with ...
1995 Cadillac DeVille 4.9L radio,wipers VIN: 1G6KD52B05
Car came in with customer complaint of the battery runs down while setting. He then said that the radio and wipers come on by them selves after getting out of the car. Open the door and they stay on till you shut the door, they go off and it goes thru it again...
1998 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y7W
Thanks in advance for any insight. This car has a very intermittant no start problem. Have had car multiple day at a time to not verify customer complaint. Then last Friday I ran uptown when vehicle was in condition to see what I could see. Turns out it cranks...
1994 Chevrolet S10 Blazer 4.3L Hesitation, Surge, MIL Lamp on, Code 43 -ESC Problem
Essentially, there are two problems. (1)When the throttle is snapped from idle in park, or accelerated in gear , it will bog down then slowly recover. (2)Anytime the code (43) is cleared, it comes right back within 5 or 6 seconds, despite repairing the broken ... Trouble codes: 43 (ESC problem)
1996 Chevrolet Blazer 4.3L Engine R&R
Hello guys & Gals! I have to replace the engine on this S-10 Blazer and was looking for any tips or short cuts. Alldata says something about raising the body to gain access to some of the bell housing bolts. Is this necessary or is there a way around it?? Also...
2000 Chevrolet K3500 6.5L Hesitation, Surge, Cuts out VIN: 1GBJK34F1Y
cust was climbing hill when vehicle lost power. engine eventually lost power and stalled. after it sat for about 45 mins. a long crank eventually started it. seems to idle ok, but anything over 1000-1100 rpm engine runs rough, and there is a lot of smoke from ...
2001 Chevrolet Express 2500 5.0L Cuts out, Stall VIN: 1GCFG25M51
thank you much for your help in advance. this vehicle cut out suddenly on the road and would not restart.towed to shop in the area, found that wires were damaged by rats.after repairs vehicle runs but will shut off occasionally.code p0404 appeared according to... Trouble codes: P0404 (egr flow ckt range performance.)
2002 Chevrolet Cavalier 2.2L pushrods VIN: 1G1JC52432
cust claims she was having no problems with her car. left work, car started as usually but made some loud popping noises...drove straight to our shop. car was idling/running/starting fine so a service writer drove the customer home in the customer's car. write...
2002 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCCS1944X
Monitered O2 sensor voltage with oscilloscope and compared max and min voltages with propane enrichment to ascertain data from computer matched actual O2 voltage output. They match within a couple hundredths of a volts. Monitered O2 sensor pattern during ASM t...
2004 Chevrolet Silverado 3500 LT 6.6L tcc VIN: 1GCJK33214
Good evening ladies and gents(please read history). This allison shifted fine when it left here the last time, after multiple flushes and a TRS. Told customer to take and drive without the Edge for couple weeks to see how it went. He of course immediately inst...
2005 Chevrolet Silverado 2500 HD 6.0L starter VIN: U55F872587
Well I'm in Iraq and we got a truck in that the front bumper was damaged from hitting the conex. We replaced the bumper and it ran fine. Two days later it had a starting problem. Right now we have replaced the starter and change the battery just in case. I hav...
1993 GMC C3500 Sierra 7.4L knock sensor VIN: 1GKDC34N8P
This truck had a starter replaced a few months ago and someone damaged the starter heat shield and they didn't replace it. Now the starter solenoid is melted along with a melted knock sensor wire. My question, Is there a special tool for removing the knock sen...
1996 Pontiac Bonneville SE 3.8L abs VIN: 1G2HX52K2T
please help, have this 1996 bonneville in for an abs light that comes on in left hand turn. first time this happened, customer reported a noticable thud thud noise at the same time. the light does come on at that time and may go off on its own while driving. c...
1999 Pontiac Montana 3.4L Hesitation, Surge, Cuts out VIN: 1GMDX03E7X
Hello Cyber Techs...Replaced rack and pinion assembly and customer came back after the weekend complaining of the vehicle now bucks and jerks while giving mild acceleration. Road test confirmed the problem and it feels like someone is cutting the electric powe... Trouble codes: P0687 (Indicator circuit low), P0689 (Indicator circuit open)
2000 Saturn LS2 3.0L Starting VIN: 1G8JW52R94
owner complains that every once in a while after running the vehicle it won't start. If she leaves it set for a while then it will restart. Also the brake lights work fine when the head lights are not on, when you turn the headlights on and hit the brakes the ...
2001 Saturn SL1 1.9L Hesitation, MIL Lamp on, power loss VIN: 1G8ZH52881
Hi guys, This Saturn came to us with lack of power issue. There was also some irratic running & shifting. Initial scan showed a code P0172 (rich conditions) Both O2 sensors seemed to working correctly, with both voltage readings & graphing. Fuel pressure was 5... Trouble codes: P0172 (System rich)
2002 Saturn L100 2.2L Hesitation VIN: 1G8JS54F22
i'm back after few ez reprs. but i'm here screaming for a help,i notice after ez ones hardones show up . but its ok thats what it keeping sharp . this saturn l100 came w/misfire no power on accl. retrieve codes po300 - u got it ramdom misfire follow flowchart ...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac Seville SLS 4.6L shifting VIN: 1GGK552Y9R
Sorry it took so long to post fix request The owner had a extended warrenty The caddy was found to have problems in valve body and owner opted to replace trans
1995 Cadillac Seville STS 4.6L Traction Control VIN: 1G6KY5294S
Okay this car is fixed. When I installed the reman delco PCM in this car, it fixed the traction control problem. The PCM I put in had probems. As soon as I started the car, it came up with all kinds of communications problems. It was determined that the reman ...
1994 Chevrolet C3500 7.4L Misfire VIN: 1GBJC34N5R
Thanks to those of you who replied. This one is fixed.Ken [...]. all had it right. It turned out to be an exhaust leak between the head and the exhaust manifold.The only way I was able to detect it was with the smoke machi...
1999 Chevrolet Blazer 4.3L four wheel drive VIN: 1GNDT13W5X
Hi all - turns out it was the shift module on the transfer case. Thanks a bunch for all your input, got us started on the right track. Followed your tips and then was able to isolate the trouble.
1999 Chevrolet S10 LS 4.3L No Start, Stall VIN: 1GCCS19X8X
Well everyone this little Chevy is mobile again. There was alot to this one , the fix was the VCM sorry I took so long for the close but the used VCM just arrived today , Installed the used VCM and happened to notice the new battery that I installed was dead ?...
2004 Chevrolet Silverado 1500 4.3L mode actuator VIN: 1GCEC19X64
i made sure all previous codes were cleared,then i removed the eacs fuse in the engine compartment,and now it works fine, I would like to thank everyone for their input.
2004 GMC Sierra 2500 HD SLE 6.6L lack of power VIN: 1GTHK29154
Hello all, Customer had left high idle switch on which was hidden under dash. Take off high idle and runs perfect. Thanks to all.
1992 Pontiac Bonneville SE 3.8L Hesitation, Misfire VIN: 1G2HX53L7N
Remember plugs looking lean (white), fuel pressure was in spec. Power flushed fuel rail/injectors using MAC EMC1000. Giant plumes of black smoke out exhaust! Problem Solved. Thanks for all the great responses!
1999 Pontiac Grand Am SE 2.4L Stall VIN: 1G2NE52T9X
Sorry for the delay in responding to a fix for this car. The customer is barely home during the day so she had not been able to come back by. So her boyfriend started parts changing and after he changed the o2 sensor the car stopped stalling. So I guess the fi...
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