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1997 Cadillac Catera 3.0L engine
Hi Guys, This all started with a simple radiator repair, it came in with a broken tank on the left side. The problem I can't figure out is why this engine will push the coolant out of the resevoir. By all accounts it is not actually overheating, i.e. no coolin...		 View
2000 Cadillac Catera 3.0L abs light tc light
We need help, we have not done much in diagnostics, but we have 2 customers with same problems. the customer states abs light and tc light are coming on, speedo in-op, radio in-op at times and one customer states his p/s gets hard at times. any ideas where to ...		 View
2002 Cadillac DeVille 4.6L transmision engage
please help have a caddy with a P1825 internal shift mode switch illegal position. Hard shift will happen and then light will come on. Position on Modis reads correct but installed new shift selector switch on valve body still same problem. Also if it sits and...		 View
2004 Cadillac CTS 3.6L oil consumption
Hello and thanks in advance for any solutions. This is my son's car, he bought it used. He took it to Florida for spring break, and the "check oil level" message came on. Then the MIL came on P341 Cam sensor. When he checked the oil it was 3 quarts low. After ...		 View
2005 Cadillac CTS 3.6L Misfire, MIL Lamp on
came in with a skip and mil lamp on in modius scanner found a reset for fuel trim reset fuel trim mil light went off mis fire stopped road test twice car fine over weekend light back on and so is mis fire has anyone expierenced this problem? Trouble codes: 300 (random misfire), 302 (2 cyl misfire), 304 (cyl 4 misfire), 306 (cylinder 6 misfire).		 View
1985 Chevrolet S10 Pickup 2.5L No Start
This truck won't build pressure & pump doesn't come on when you turn the key on (not cranking), it will build 10 psi if you crank the engine for several seconds. Fuel pressure drops to zero as soon as you turn the key off.I have put 2 fuel pumps in both Carter...		 View
1989 Chevrolet Camaro 5.7L Poor Idle Quality, MIL Lamp on
service engine soon light 0n, engine idles at 1200 rmp has current code 22 tps too low. when code is cleared and vehicle is started engine idles ok while light is off, about 5-10 seconds and then goes back to 1200 rpm. have checked voltage and refrence signal ... Trouble codes: 22 (throttle position sensor too low).		 View
1995 Chevrolet Corsica 2.2L MIL Lamp on
Car has new egr valve, solenoid tests good, good vacum, and egr is commanded at correct times, but light will return at highway cruise. Thanks in advance for your help. Trouble codes: 32.		 View
1995 Chevrolet Pickup 5.7L flaps
system when switched to max ac still bleeds air out of defroster and floor, air very cold . all speeds working but not enough air coming out of dash vents on max. I have limited info with Mitchell on demand.		 View
1997 Chevrolet Corvette 5.7L a/c, seats, lights
Hey guys. I usally don't work on this type of car but it was handed to me tonight. Started as no a/c. Found fuses removed. After questioning the customer he stated that the blower motor would turn on by it's self w/ key off and out of car.After a nice conversa...		 View
1998 Chevrolet Pickup 5.7L Stall, Misfire
i installed engine truck ran fine. customer wanted to install his own exhaust,let him take to have exhaust installed when exhaust is finished i want it back to check everything. next thing i know its back on tow truck. starts when you give it gas dies out. hoo...		 View
1998 Chevrolet Pickup 6.5L Stall
Problem is intermittant stall / with (usally ) quick restart Due to the fact this 6.5L had a P0251 code we supected the injection pump - problem was engine would die and usally restart (instantly) but at times "crank/ no start" - when the engine died we saw a... Trouble codes: P0126 (Insuf Coolant temp for stable operation), P0236 (Boost Snr 1 out of range), P0251 (Inj Pump A rotor Cam problem).		 View
1998 Chevrolet Cavalier 2.4L MIL Lamp on
car came in with check engine ligth on found code p1336 crankshaft position variation not learned tryed about 100 times with snap on modis to perform cranksahft varition learn procedure and it will not take perform diagnoiss as per all data , tryed crankshaft ... Trouble codes: P1336 (ckp variation not learned).		 View
1999 Chevrolet Suburban 6.5L #20 fuse shifting
need help #20 fuse blows "while beating on it" is the complaint. found 30 blown fuses on floor. installed fresh fuse test drove truck all good. tryed "beating on it" but how much can you beat on a 157k 6.5 diesle. any ways got it to act up fuse good getting sh...		 View
2000 Chevrolet Silverado 4.8L oil pressure
vehicle runs normally with no engine noise no check engine lite and no other problems. after about ten minutes of driving the oil guage pegs low at stops and the message center reads check oil pressure. put on e-brake and leave in drive and get out to listen t...		 View
2000 Chevrolet Silverado 5.3L Reverse
Hello folks need to be rescude.Truck came in with hard shift .Replaced valve body and lost reverse.Removed valve body checked to be sure all balls in the right spots.Missed one the first time.Replaced vavle body again,Still no reverse.Reinstalled old valve bod...		 View
2002 Chevrolet Impala 3.4L Misfire
got this impala with 3.4 engine car has miss fire scanned car for codes and didnt find any missfire code but it did have one for fuel gauge problem went to data and saw missfires in #1 #3 cyl.we did a tune up on it with wires,plugs performed compresion test wh...		 View
2002 Chevrolet Impala 3.8L MIL Lamp on
Greeting fellow techs, Hope someone can help me here. I have this 3.8 Impala that is setting code p0102 for the mass airflow sensor. Initial diagnosis showed that the MAF reading would change dramatically on scan tool when wiggling plug. Soldered in new plug,... Trouble codes: p0102 (MAF low).		 View
2004 Chevrolet Colorado 3.5L abs light
I first want to thank all for their response to my previous brake issue. I put new brake rotors, pads and replaced the rear adjusters. Upon backing it out of the garage and going up the drive, the brakes grabbed badly till it set the abs lite and then the brak...		 View
2005 Chevrolet Express 6.0L Mechanical
driver complaines that the brake pedddel goses to the floor & looses power steering. I have checked belt & tensioner and there ok. replaced master cly. still have problem. I belive that it is a power assyst problem or hydro boost problem. thanks for any info.		 View
2005 GMC Savana 6.0L steering control
I could use some help on this one. Customer complained of the stability light coming on. I test drove vehicle and never saw the light come on. I scanned the system and found a C0455. I couldn't find much info on this code and how to check it out. We told the c...		 View
1995 Oldsmobile Aurora 4.0L MIL Lamp on
hello all i have a olds aurora that has a code 85.the light comes back as soon as i erase it.the idle drops to slow when reved up.i installed a new idle solenoid and relearned the idle per alldata.i would appreciate some insite on this problem.i have a genesis... Trouble codes: 85 (idlelearn at maximum authority).		 View
1997 Oldsmobile LSS 3.8L tcc
ok, here goes. I just bought this car(couldnt pass it up for $250 in showroom condition, 70 year old man owned it) anyway, i have a transmission problem, I flushed fluid and changed filter and made problem a little better, but still there. problem is, when car...		 View
1998 Oldsmobile Silhouette 3.4L accessories
this is my friends van! so need all the help i can get! thanks in advance for all the help! first off we had the van towed in and i checked all the fuses and there were 4 blown. power mirror,power locks,ctsy lamps and e.l.c. i cannot find out what the e.l.c. f...		 View
1999 Oldsmobile Bravada 4.3L blend air servo
i've got a 99 olds bravada the problem is that the blend air door servo is being driven to the full hot position at all times. I removed the servo to check the door operation and it is free to move in both directions. I can manually twist the servo and leave t...		 View
1998 Pontiac Bonneville 3.8L Stall
This pontiac has a very intermittent stall problem which generally occurs on deceleration. Each time it occurs it sets a po102 code. Power and ground to the sensor and the 5 volt square wave were monitored in the shop on a lab scope with the engine running. Du... Trouble codes: po102 (low input - maf sensor).		 View
2001 Pontiac Grand Am 3.4L Cooling Systems
hey every one thanks in advance for ur time and help this car the fans wont come on time, replaced the t-stat coolant sensor. bleed the system many times... fans come on intermittent (low speed)temp at 90-95c when the fans r not on coolant starts to boil and ...		 View
2002 Pontiac Grand Prix 3.8L Excessive Emissions, Poor Fuel Economy, sulphur smell
Customer returned 9 months later saying she had an exhaust leak from our previous work.She stated she gets horrible mileage. she stated her exhaust smells like rotten eggs(sulphur).She also needed wheel bearings. We replaced thehub assemblies. welded the small... Trouble codes: p1811c (maximum adapts and long shift).		 View

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Park Avenue 3.8L Excessive Emissions
Good morning everybody I would like to thank everyone who sent me ideas of what could be wrong with this car.It ended up being a pin hole leak in the plastic fuel line by the firewall.I must have overlooked this before,thats what happens when your in a hurry.A...		 22
1992 Cadillac Eldorado 4.9L Surge, Cuts out
This Caddy did not get repaired. I found info on the cruise servo position sensor causing the same problem, but after following that it didn't help. It acts like the PCM is trying to save itself. But I have run out things to scan, scope, or trace down. I've ne...		 13
1994 Chevrolet Caprice 4.3L hard to start
We fianally fixed this car. The fix was a bad fuel injector. All of the replies were very helpful and after ruling everything else out, we started checking the obvious again. Thanks again IATN!		 22
1995 Chevrolet Suburban 5.7L rear heater
not wanting to just cut the fitting off the hose and clamping it to the pipe risking a costly comeback should the hose slide off-thank you dave---dorman has everything.		 5
2000 Chevrolet Silverado 5.3L no 4wd
I WOULD LIKE TO THANK EVERY ONE WHO RESPONDED AND ALSO IF ANY ONE ELSE HAS ANY IDEAS IT WOULD BE MUCH APPRICEATED. I RECIVED A FEW REPLIES, ONE SAID TO CHECK TO SEE IF T-CASE COULD BE SHIFTED BY HAND. WE TRIED AND IT WOULD SHIFT BY HAND. ANOTHER GUY SUGESTED I...		 4
2001 Chevrolet Impala 3.8L Hesitation, Surge
tHANKS FOR AL [...] THE HELP ON THIS ON IT TURNED OUT TO BE THE CAT. THE MONOLITH IS COMPLETELY PLUGGED UP REPLACED THE CAT, WIRES ,AND PLUGS AND SENT THIS ONE DOWN THE ROAD!		 36
1998 Oldsmobile Achieva 3.1L all system
thank you for all the help, we did find the problem, the issue was a broken wire from the ignition switch and the regulator. the wire was touching sometimes and not others, repaired the break and problem fixed. thanks for all the help.		 7
2005 Pontiac Sunfire 2.2L temp gauge
well I do not have much reply so I go ahead put in new cluster and have gm reprogramme it everything works well thanks to all who take time and reply		 3
1998 Saturn SL2 1.9L Will Not run monitors
Thanks to all for responding. We originally replaced the T-Stat and it brought the temp up 30 deg but not enough to run monitors. With the advice given from most, we replaced the temp sensor and sure enough it was slightly out of calibration with the correct t...		 20
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