99 GMC 4 wheel drive?
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Topic: 99 GMC 4 wheel drive?
Posted By: Tracy Martin TN
Subject: 99 GMC 4 wheel drive?
Date Posted: 01 Oct 2020 at 7:05pm
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My truck was giving trouble and now will not shift into 4 wheel drive. Has the switch on the dash. I had problems the last few times getting it in gear and out of gear. How do I check the switch or actuator. What is most likely culprit? Thanks Tracy ------------- No greater gift than healthy grandkids! |
Replies:
Posted By: shameless dude
Date Posted: 01 Oct 2020 at 10:54pm
| the actuator will snap into and out of place if working. don't put your fingers up where it's at or you'll be missing them. they are easy to test, easy to take off and put the juice to it to see if it moves. check wires too. i've never had a problem with a switch yet, not saying that isn't the problem. |
Posted By: Brian Jasper co. Ia
Date Posted: 01 Oct 2020 at 11:13pm
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It's been a while since I've worked on on of those, but switches were common failures as were the encoder motor sensors. You need to get a scan tool and pull the codes from the TCCM. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: Tracy Martin TN
Date Posted: 01 Oct 2020 at 11:19pm
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Thanks guys, I will check it out. Tracy ------------- No greater gift than healthy grandkids! |
Posted By: Thad in AR.
Date Posted: 02 Oct 2020 at 5:12pm
| Tracy I have the same truck and had to replace the switches a few times. |
Posted By: Tracy Martin TN
Date Posted: 02 Oct 2020 at 6:56pm
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Thad, the switch has no lights, fuses are good. I will start with switch. Thanks Tracy ------------- No greater gift than healthy grandkids! |
Posted By: Thad in AR.
Date Posted: 03 Oct 2020 at 6:50am
Tracy we’re knocking on 2021. We may have to trade up one of these days. The thought spooks me a little. Mine is by far the best truck I’ve owned. |
Tracy Martin TN wrote:Posted By: Tracy Martin TN
Date Posted: 04 Oct 2020 at 7:49pm
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Thad, this is only vehicle I special ordered. It is by far the best truck I have ever owned. I have looked at many new and used ones, but the reviews scare the hell out of me. For the money they cost, there shouldn't be problems like that. Tracy ------------- No greater gift than healthy grandkids! |
Posted By: shameless dude
Date Posted: 05 Oct 2020 at 1:20am
| mines a '97 and '98, both great trucks, reason for me keeping them is my back don't hurt while driving them. and it's really hard to find anything with cloth seats anymore. |
Posted By: Thad in AR.
Date Posted: 05 Oct 2020 at 5:49am
You got that right. The new ones are out of reach for me. The used all have over 200000 miles or priced like new. I’d like to find around a 2010 with low miles similar to my truck. Mines sitting on 400000 miles and starting to show its age. |
Posted By: Ed (Ont)
Date Posted: 07 Oct 2020 at 7:51pm
| I have a 99 GMC 2500 with 6 litre gas engine. It’s been a great truck. Did take reverse out of the trans from plowing snow. Apparently a band in there that breaks from going in and out of reverse so often. Rest of tranny was good. |
Posted By: shameless dude
Date Posted: 07 Oct 2020 at 11:10pm
| Thad...last one i bought had about 286,000. on it, everything worked as it should. still a great truck until squirrels got in and ate the wiring in the engine compartment. still gonna keep it right now and try to fix the wiring. high miles is still a good marketing tool, but it doesn't scare me. |
Posted By: Coke-in-MN
Date Posted: 08 Oct 2020 at 12:56am
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Switch is the common problem on the push button 4 wheel , Now mine only have 98,000 on the 6.0 engine , 2nd transfer case as first one went out at 3,000 miles , second one went out last winter - I rebuilt it myself after someone on here said they did - $75 for parts needed - after picking up another transfer cade and finding out it was for 2003 to 2007 and cant convert it over easily for shift motor 2 wire to 1 wire and different shaft on side of case . Jack front end up - see if when you turn one wheel if other wheel turns - will tell if front axle shift motor is working - drive shaft seems to turn all times on these front axles I had the input pinion bearing go out in mine which locked up front and when I powered up to move truck is burned out clutch pack in just a few minutes If you have the 4L80 transmission it should be solid - been plowing commercial lots since 2000 with this truck and BIG THING ON NOT SHIFTING WHILE MOVING - come to complete stop before reversing ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: Coke-in-MN
Date Posted: 08 Oct 2020 at 1:02am
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What really ticked me off when searching for parts for mine which is 2000 with the 6.0 is finding out here in the stated the 2500 series have a 1/2 ton frame under then with the NEW body style, sons 2500 Suburban is the same way , they used the light 1/2 frames to rush the new style out , and they are not Heavy Duty - they use 3/4 ton running gear adapted to the 1/2 ton frames - so front and rear carriers are HD but the truck itself isn't ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: Thad in AR.
Date Posted: 08 Oct 2020 at 5:15am
I agree. I can easily see getting another 100000 out of mine. Starting to rust the rockers n such but drives like new. My previous truck was also a GMC and I sold it with 330000 miles. I that was 10 years back. Still see it once in a while. My next will most likely be another GMC. I hope |
Posted By: HD6GTOM
Date Posted: 08 Oct 2020 at 10:16pm
| Guys at the dealership we saw a lot of switches bad and a lot of motors bad. They have some plastic parts in there that break. Guys dont shift these things "on the go". The plastic stuff won't stand up to it. Dang it, probably outta think about putting the snow plow on ol Red. 1999 HD 3/4 ton. |
Posted By: Gordy
Date Posted: 09 Oct 2020 at 8:59am
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When the switch went bad on mine I found it had solder cracks around the terminals on the circuit board can be seen with magnifying glass re soldered works fine. ------------- “If you can't explain it simply, you don't understand it well enough” |