GM Automotive Technicians Technical Discussion and Fixes for Jun 29, 2005

Join Now

Prev	Professional Automotive Repair Technical Discussions for June 29, 2005 International Automotive Technicians' Network (iATN) - Members Only	Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM

	Help Request	Answers
	1992 Buick Roadmaster Limited 5.7L battery light VIN: 1G4BT5374N This started a while back, alternator failed in South Dakota, customer had it replaced (NAPA part) and made it home. 2 weeks later batt light comes on again, again bad alt, replaced under NAPA warranty. That was 1 month ago, now same deal. batt light comes on ...	View
	1997 Buick LeSabre Custom 3.8L Engine VIN: 1G4HP52K2V Hey everyone, I hope you guys can help me out on my own set of wheels. My wheels threw a rod and engine now dead. got a used motor from the local salvage yard at a good price. The motor is out of a 2002 model year Buick. The used motor is complete with everyth...	View
	2002 Buick Rendezvous CX 3.4L Compressor? VIN: 3G5DA63E42 Customer complaint was a noise when turning the wheel, and the a/c was warm. When I drove it I heard no noises, but the A/C is not cold at all. The compressor engages and stays in, but the low side does not get cold. My other concern is that the compressor see...	View
	2002 Buick Century Custom 3.1L Compressor thank you in advance for reading this post. The vehicle in question does not have AC compressor engagement. The system is manual AC. Battery,ignition power and the ground circuit for the control head are present but there is no signal out of the head to the PC...	View
	1993 Chevrolet Camaro 3.4L Misfire VIN: 2G1FP22S1P this car develops a miss at all speeds when warm. this miss comes and goes. i have only seen this vehicle have a hard miss single cyl once. other times it will miss once and come back to life. scoped ignition and found nothing. when it had a hard miss i notice...	View
	1998 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEK19R2W The Mil lite has come on 2 times now for this code wehave been over the system both times the data looks good the valve opens and closes checked voltages and grounds resistance on valve ok checked for restrictions from cannister to fuel tank ok we even dropped... Trouble codes: P0446	View
	1998 Chevrolet Malibu 3.1L cyl 4 misfire VIN: 1G1ND52M3W Help please!! Engine misfires on #4 at all times. plug wires new (12k ohms). Injector flow was good. It was noted that after idling at full temp for over an hour there were small puffs of steam at the tail pipe. Removed #4 plug with piston near TDC, pressurize...	View
	1999 Chevrolet C2500 Suburban LS 6.5L Air Conditioning VIN: 3GNGC26F4X I am having trouble making the rear ac blow cold on this 99 Suburban. The complaint was that as the day gets warmer the ac would warm up also. I am in Houston so "warm" here is 90 to 100 deg with very high humidity over 75% almost all the time in the summer. I...	View
	2000 Chevrolet Tahoe 5.7L abs system VIN: 1GNEK13RXY this vehicle came in a week ago from another shop after having front brakes with rotors and cleaned and adjusted rear drum brakes. the customer said his abs light was on pulled codes it had a rf sensor code test drove vehicle with scan tool connected lf,rear s...	View
	2001 Chevrolet Suburban 1500 LS 5.3L Poor Idle Quality, idle drop out VIN: 1GNEC16T91 Hey GM experts, I've never seen one like this before. This 5.3L will drop idle speed to almost a stall (but never actually stalls) every single time the A/C compressor clutch is about to engage or about to disengage. The drop out only lasts approx 1-2 seconds...	View
	2004 Chevrolet Silverado 2500 HD 6.6L steering effort VIN: 1GCHK23274 hi guys,we have this truck with oversize tires that in paking lot manuvers sometimes steers hard . the steering binds and sounds likeyou would be in the extreme lft or right position. it will free up if you leave off the brake and ever so slightly roll the tru...	View
	1992 Geo Prizm 1.6L starter VIN: 1Y1SK546NZ The starter does not crank at times. Sometimes you hear a faint click, sometimes not. The problem is very irratic to occure, I never got the no crank to occur for me. I replaced the ignition power termnal on the starter because it was weak. Customer drove 1 we...	View
	1997 GMC C1500 Sierra SL 5.7L tcc VIN: 2GTEC19R0V Looking for some help on my Own truck. It is lifted with 35" tires and I just had a very reputible tranny shop rebuild and beef up my tranny and change the housing so that I could run a NP241 transfer case. I have been running the 35s and JET speedo recalibrat...	View
	1998 GMC K1500 Sierra SL 5.7L Differential VIN: 2GTEK19R6W has anybody put in a light duty 3/4 ton housing in one of these k1500's ?, what will I need to do it, appreciate any help, thanks!	View
	2003 Hummer H2 6.0L air inlet door inop VIN: 5GRGN23U63 please help. i have scan tested this hummer and code b0229 come up. please be advised that my tech two will only access the body computer if i enter it in as a 2004 year model, so i may be chasing the wrong thing all together. but the code stored is for the ai...	View
	1965 Oldsmobile Cutlass 400CID Hesitation VIN: 338675M230 This is for some of you "old timers" out there. (no offense intended). This one came in with the complaint that it wouldn't start cold without adding fuel to the carb. I let it sit over night and sure enought it wouldn't start. The choke was stuck wide open an...	View
	1996 Oldsmobile Achieva S 3.1L warning lights VIN: 13NL52M5TM Sure could use some help,on this one.Cluster warning lights stay on and no tach, car runs fine.I keep getting history code in IPC code B1021 loss of PCM serial data. Got this one dropped in my lap from another shop, they tried both a used PCM and cluster. I se...	View
	1989 Pontiac Tempest 2.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on Hello, i am working on this 1989 pontiac. with a 2.8 PFI and it is running rich all the time, replaced the o2. it was reading lean all the time. now with the new O2 is it always rich. removed the plugs to inspect, and it confirms that it is running rich, plugs... Trouble codes: 44 (exhuast lean), 45 (exhaust rich)	View
	1996 Pontiac Grand Am GT 2.4L reverse gear, 2nd , 4th gear VIN: 1G2NW12T1T This Grand Am has what I believe is the Isuzu 5 spd. transaxle in it. The shifter doesn't want to pull to the rear enough to engage reverse or any other gear at the rear of the shift gate. If I unhook the cables at the transaxle, I can get reverse or 2nd or 4t...	View
	1998 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB124XW posting for my buddy,Got a wierd one. Engine cranks normal will not start. Plugs black and sooty. Engine compression is fine, cranking vacume 8inches but pulse width on cranking is 22 ms with a 99 engine temp. All basics coverd. Crank sensor was replaced and m...	View
	2001 Pontiac Montana 3.4L Rear VIN: 1GMDX03E21 Front air works great cools to 38F rear blows 80F. The blend air door is moving rear evaperator is not getting cold. lines at rear are the same temp. I think it is a rear expantion vale but our GM store has never sold one so I want to see if any one has seen t...	View
	1997 Saturn SL1 1.9L a/c VIN: 1G8ZH5281V good morning, this is a clean car not crashed or abused. when a/c is on and car in gear the belt tensioner makes noise. if you "touch" tensioner the noise stops. tensioner was replaced 8 months ago but i tried another and no difference. a/c works great and clu...	View

Fixes & Summaries for GM

	Fix/Summary	Answers
	1976 Cadillac Fleetwood 60 Special Brougham 8.2L load levelers VIN: 6B69560310 Hello everyone and thanks for the help on this one. I received some great replies on its operation. This one uses a very primative compressor that basically runs at all times off vacuum. The compressor was no longer functioning. The customer had the compressor...	7
	1993 Cadillac Seville 4.6L Poor Idle Quality, high idle VIN: 1GCKY5294P The high idle is gone and car runs well but I don't feel we've taken this Caddy as far as we should have. The replies were all good and we checked and performed what was recommended by you guys as follows: -checked battery and cable connections - they were g...	4
	1998 Cadillac DeVille 4.6L a/c system VIN: 1G6KD54Y5W Like many of you recomended, remove the orfice tube it will be restricted. This one was 5 very small pieces of aluminum and soaked with oil. Replaced orfice tube and started blowing out line from condencer and recharged, instantly the orfice flooded with oil a...	11
	1994 Chevrolet Blazer 5.7L MIL Lamp on VIN: 1GNEK18K1R Thanks to all who set me straight, chevy 350 vin K TBI trucks (along with a whole list of other vehicles - see tech database) do not hold any fuel pressure after the fuel pump stops. After I got past that hurdle, my attention turned to the aging egr and soleno... Trouble codes: 44 (lean exhaust).	11
	1996 Chevrolet Blazer 4.3L tcc VIN: 1GNDT13W7T Sorry guys, at this point we have not fixed the vehicle. Most of your replies were good, but were things we had checked already. We had installed a 'shift Kit'. We tested all the solenoids, checked wiring and module. we checked the brake lights and brake light...	12
	1998 Chevrolet Malibu 3.1L very long crank VIN: 1G1ND52MW4 ok, i went through each post and checked each item to see if i had already done it and if it still needs to be done and these are the results. No leak at the regulator, prom update has been done already (i didn't mention that in my original post). TPS is withi...	26
	1999 Chevrolet Blazer 4.3L Odometer VIN: 1GNDT13W5X IPC was the problem. Customer agreed just coincidence that it failed after engine replacment and paid bill. Installed used and odomoeter working fine now (except we lost 30,000 km's!!). Disassembled but only problem found was LED's for PRNDL and odometer had...	10
	1999 Chevrolet Tracker 1.6L No Start, Stall VIN: 2CNBE1861X fisrt off thanks to the 2 replies. however the fix for this vehicle was the cam sensor. opon double checking myshelf i found that the cam sensor on this vehicle is for engine speed and that is what the computer logic needs to see to tigger ingtion and injector...	2
	2000 Chevrolet Monte Carlo SS 3.8L Cuts out, Stall VIN: 2G1WX12K5Y Hi group, new mass air flow sensor fix the problem, but yet i don't understand, 1=why i had no codes for bad air flow sensor 2=with unpluged mass air flow sensor wire and engine running why check engine light never came on. and what readings are normal on scan...	13
	2002 Chevrolet Cavalier LS 2.2L Cuts out, Stall VIN: 1G1JF52F02 Installed a new coil and the problem is gone. There was no miss in the engine under load. Just the stall at idle. I did not scope the crank sensor as some suggested because the coils and injectors continued to fire even during the stall. However I found the co...	6
	1996 GMC K1500 Sierra SL 4.3L High Idle VIN: 2GTEK19W8T Cleaned the throttle body and it helped a lot but not quite right. Changed out the IAC and Yahoo works as you would want it to. All PCM counts were correct and no binding throttle linkage also cruise control was adjusted correctly no vagume leaks. Thank you fo...	11
	1998 Pontiac Grand Am SE 2.4L pass key VIN: 1G2NE12T1W this was an easy fix after i recieved the how to- i recieved 13 replies and all were great and appreciated but 6 hit it on the head- Bill from ill- Bob from minn-Ralph from alberta-Allen from nc-David from ohio and Pete from ontario- all hit it- all we had to ...	13

(Also Available: All, Asian, Chrysler, European, Ford, GM.)