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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 1, 2006
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1997 Cadillac Eldorado ETC 4.6L Poor Idle Quality VIN: 1G6ET1295V
I have the boss's Caddy here. Very intermitantly (about once every 2 weeks)it will stick the idle at about 3000rpm and stay until shut off for awhile. The one time I have seen it the IAC counts were very high so the ECM is controlling the high idle. They bough...
1999 Cadillac Seville STS 4.6L Poor Idle Quality, MIL Lamp on, high idle VIN: 1G6KY5499X
vehicle has a high idle of about 1000rpm which illuminates MIL. There is no apparent vaccum leaks! runs good! just high idle. Smoke test indicate NO vaccum leak. HELP Trouble codes: P0507
1996 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M1T
coolant temp reading on scanner is normal until it reaches 120 f, then jumps to 283 f. engine is not overheating, pull connector from cts, and temp reading drops to -38 f, which it should. put in aftermarket cts, no better. put in oe cts, no better. reading te... Trouble codes: P0117
2000 Chevrolet Tahoe LT 5.3L Battery VIN: 1GNEK13T9Y
We have a strange one on our hands here. This Tahoe will have a dead battery around this time of year. Dead battery at least 1 time a year. The customer will go out to her car and the battery is stone dead. This happened 2 days ago after sitting for only 2 hou...
2004 Chevrolet Silverado 1500 4.3L Hesitation, Cuts out, Stall VIN: 1GCEC14X24
I have a 2004 chevy it was in last week with a no start it had a bad coil replaced coil and started and ran great. The customer has brought it back and said it was missing and bucking he said it did this before it quit running last time. It only happens when i...
1997 GMC Savana 3500 5.7L Hesitation, MIL Lamp on VIN: 1GTHG35R3V
fellow techs; we're seeking help with this one. seems to be a progressive, continuous problem. freeze frame data follows: rpm 3223 tps 73% speed 69 map 93 maf 93.42 st-1 0% st-2 0% lt-1 6% lt-2 6% coolant 198 engine load 48% Trouble codes: P0101 (maf), P0131 (o2 signal low bank 1 sensor 1), P0151 (o2 signal low bank 2 sensor 1)
1999 GMC K3500 Sierra SL 7.4L Poor Idle Quality, MIL Lamp on VIN: 1GTHK33J5X
I have a real problem here and we cannot figure it out. The customer came in with the check engine light on. We code scanned the computer and the code p0175b, came up. Reading the scan tool we noticed the long turn fuel trim was reading -14 to -20 on bank 2. S... Trouble codes: P0175
2000 GMC Yukon SLE 5.3L Poor Idle Quality VIN: 1GKEC13TOY
This Yukon will idle at about 500-600 rpm, stumble a little then pick up to around 950 rpm's. Customer has complained of an intermittent dieing problem. I performed all above repairs as he had never done any maintenance on the vehicle since he bought it new. I...
2004 GMC Sierra 1500 SLE 5.3L left inner axle VIN: 1GTEK19Z24
Left axle seal was leaking. Usually able to seperate inner axle, remove shaft with slight tap to gain access to seal. I went from a tap to a big hammer, shaft would not come out. Went through the iATN data base. Tryed everything except cutting the shaft. I did...
1972 Oldsmobile cutlass 350CID oil pressure VIN: 3J57K2R175
I had a repost on this about 3 weeks ago asking for ideas on what to do before cranking this up and several of you had the suggestion of removing the valve covers and distributor and spinning the pump by a drill. Well I did all of that and I still don't have o...
1989 Oldsmobile Cutlass Ciera SL 2.8L Cuts out VIN: 1G3AM51WXK
car idles well and has good power.at about 3200 rpm it wont rev any higher.it does this cold or hot.it does it in neutral or driving.it will rev slightly higher after driving about 10 miles.(3200 up to 3500)no codes.checked fuel pressure,does not drop when thi...
2000 Oldsmobile Intrigue GL 3.5L themostat
Hey everyone i need some help on this one. The car will try and get hot not overheat just hot when traveling slow speeds low rpms or just idling but onloy if the heat is on full max. Any other temp difference and it will open themostat properly and stay in it ...
2001 Saturn SL1 1.9L Cuts out, Stall VIN: 1G8ZH54831
Need some help with this Saturn. Towed in a few weeks ago after bucking and dying out on road. Car ran when it got to shop. Fuel pressure was 45 - 50 psi at idle. Drove car with fuel guage on and under a load pressure dropped to about 15 psi and died. Would st...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Park Avenue 3.8L heater core VIN: 1G4CW53L6P
Gave to customet to drive. Added grounds, flushed system, added dexcool.Thanks for all your help!!!
1994 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52L1R
thanks to all,alot of you were rite on,found plug wires carbon tracking and arking on shields to plug boots, wasnt able to see this untill wires were removed, leson learned thanks again Trouble codes: P0755, P0123, P1406.
2004 Cadillac CTS 3.6L Shift Interlock,Key solenoid VIN: 1G6DM57784
Sorry this took so long I finally gave in and sent it to the dealer it took them 3 days to figure out so I don't feel so bad I didn't get the exact way they determined the fault but they replaced the PCM and that fixed the problem. Thanks again to all of y...
1984 Chevrolet Corvette 5.7L Battery draw VIN: 1G1AY0785E
This one is taken care of. Most of the replies said to check the alternator. I had done that earlier in the game and im sorry i didnt post that in the help request. I finally found the antitheft module way up in right side of the dash. I unplugged it and the d...
1990 Chevrolet K3500 Cheyenne 7.4L Stall VIN: 2GCGK39NOL
thanks to all that helped...note to one self,dont listen to customer when he says they put in a NEW part...come to find out it was a poorly rebuilt distributor...i got a new one like all of you suggested...problem solved
1992 Chevrolet Lumina 2.5L Charge Light On VIN: 2G1WL54R4N
will it turns out that the regulator in rhe alternator was bad. we replaced alternator & problem was fixed.thanks for all the help.
1995 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality, low power VIN: 2G1WX12X2S
Dear Techs; I first want to say a big THANK YOU to the 6 that replied. Another car is fixed thanks to your help! 5 out of the 6 replies thought the problem was in the cam timing; 1 said check the plugs/wires. And as usuual the majority were right! As you could...
1997 Chevrolet K1500 Cheyenne 5.7L abs VIN: 2GCEK19R0V
thanks for all the help, although i must admit when i pulled both sensors out i couldn't begin to imagine that what little bit of surface rust i found was the problem, but cleaned and put back together and problem was gone.thanks again
2000 Chevrolet Blazer LS 4.3L oil gauge VIN: 1GNDT13W6Y
Almost everyone suggested I check the oil pressure with a mechanical gauge. So I took out the distributor again in order to get to the sensor. Took sensor out and screwed in gauge. Pressure at idle was close to 50 lbs. Took the distributor back out and put sen...
2003 Chevrolet Suburban 1500 LS 5.3L trans interlock VIN: GNFK16Z23G
Thanks for the help men. Got the new cable assembly and everything went smooth. Appreciate the help from all at IATN! Tried to personally reply to all. Thanks again, Isom
1995 GMC K2500 Sierra SL 6.5L No Start VIN: 1GTGK29F1S
Not a lot of response on this and no overwhelming agreement,it seems to me that it would be best to put on a rebuilt pump.
1996 GMC Jimmy 4.3L shift assyl VIN: 1GKDT13W3V
Hello again everyone. I have fixed the shiftlock on the jimmy. I replaced the shifter assyl with a known good used one from a local yard and it works good. I checked all the wires to the control lock on the bottom of the shifter and found good voltage when the...
1997 GMC Savana 1500 4.3L distributor VIN: 1GFTG15R8V
Thanks all, well in being I was stupid, I forgot to put the crank sensor back in when trying to start the van. once installed, I got spark. Van is still not running, and if changing the computer doesn't fix the problem, I'm sure there will be a new post next w...
1995 Oldsmobile 98 Regency Elite 3.8L MIL Lamp on VIN: 1G3CX52KX4
Thanks to all that responded and sorry for the delay but I wanted the customer to drive the car a few days before calling it fixed. Unfortunatly, the only explaination I have is excessive relearn time. That night, after conferming correct parts with another de... Trouble codes: 623 (prom error).
2001 Pontiac Montana 3.4L Starting/Theft? VIN: 1GMDX03E81
Van is now running. We knew the system was going to have to be re-programmed and took the car to the local dealer. They found (5.5 hrs later) that the theft deterent module was the cause. Relaced, re-programmed, keys, etc... and working great now. As most repl...
1996 Saturn SL1 1.9L Poor Idle Quality, Stall VIN: 1G8ZH5285T
customer took vehicle and drove then came back a few days later, saying now that it is when you hit the brakes that it almost dies and when you hit the brakes and turn the steering wheel it does die. they decided to try and live with it, thanks to everyone who...
2000 Saturn SL1 1.9L engine VIN: 1G8ZH528XY
I recieved a terrific response on my Saturn problem. It's clear that most of you have seen this problem. This is my first with a saturn. My tech disassembled and found a crack in a cam journal. It's amazing that my machine shop missed it. One of the comments w...
2005 Saturn Ion-1 2.2L No Start VIN: IG8AF52F85
The correct procedure for programming this saturn is: 1.-Select Configuration on the TIS main menu 2.-Select Options and then change to Saturn the salesmake and dealership options. 3.-Close and open TIS 4.-Connect TechII to Veh using CAN VIN and also connect T...
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