New to me 08 Sierra RCSB

[mcmlxix]

So I just picked up a Sierra tonight... Needs a little attention and a good cleaning... Cruise control isn't working and the rear is whirring a little... 122K miles... Here are the pics from CL...

[mcmlxix]

step one, new (to me) wheels and tires... Enkie RT6 in 20x9 .... Going to get some low mile takeoff Goodyear Eagle LS2 in 275/55/R20.

[mcmlxix]

OK, so the rear is making noise ... I would like to replace GM unit rather then rebuild it... what are my options... best solution without costing a million bucks... needs to be done in the next week or so....

I think I want a Detroit Truetrac ... not sure about the part number. I got a list of RPO codes from the dealer and I didn't see the G80 posi unit listed and it doesn't have the HD tow package...

I think this is the one.... GM 8.5 Detroit Truetrac Posi Differential 30 Spline: P/N 913A481

[KEL]

Originally Posted by mcmlxix

OK, so the rear is making noise ... I would like to replace GM unit rather then rebuild it... what are my options... best solution without costing a million bucks... needs to be done in the next week or so....

I think I want a Detroit Truetrac ... not sure about the part number. I got a list of RPO codes from the dealer and I didn't see the G80 posi unit listed and it doesn't have the HD tow package...

I think this is the one.... GM 8.5 Detroit Truetrac Posi Differential 30 Spline: P/N 913A481

Ever get an answer to this ?
Thanks.

[mcmlxix]

Originally Posted by KEL

Ever get an answer to this ?
Thanks.

Yes... Detroit Locker 913A481 Trutrac Differential is the correct one... it needs the correct bearing set for the late model trucks....

2x Timken LM603049
2x Timken LM603012

[KEL]

Thank you.
My G80 quit and I need to do something before the snow falls.
Guess you dont have that problem in Vegas.

[redracer95]

nice truck. what motor do you have in it?

[mcmlxix]

Originally Posted by redracer95

nice truck. what motor do you have in it?

4.8L / 4L60e ... I'll drop in a 6.0L when it dies...

[mcmlxix]

Here's a pic with the wheels installed... Just ordered 2" rear lowering shackles... That's it for now because I need to have the rear rebuilt... Detroit Truetrac? Yes Please.

[468BIGBLOCK]

nice truck. and i love white.

[mike1971c10]

Here's my new to me 2008. Got a good price on it because it has 93,000 miles on it needed a few things fixed but good overall

[redracer95]

did you get you cruise control fixed? I ask because I just got a 2008 Seirra rcsb 4X4 4.8l and the cruise control is not working either. Any help would be greatly appreciated.

[mcmlxix]

Originally Posted by redracer95

did you get you cruise control fixed? I ask because I just got a 2008 Seirra rcsb 4X4 4.8l and the cruise control is not working either. Any help would be greatly appreciated.

I did. As long as the light on the steering wheel comes on, its most likely the brake switch attached to brake pedal arm. A/C Delco# D1586H, GM# 15861245. All you need is a 10mm wrench and a small screwdriver to pry the clip apart. It's a ten minute job to swap the switch. * If the light on the steering wheel doesn't come on, you may have other issues such as a bad fuse.

[redracer95]

sweet. yes the light on the steering wheel does come on. thanks for the reply and part numbers. i'll give it a try.

[redracer95]

stop lamp switch is ordered. i'll let you know what happens.

[GMCJOE]

Just pull your stop switch off the pedal, pull it apart, clean it, put it back together. It will work after that. Most of the time the connections just need cleaned up on the inside.

[redracer95]

cool! thanks i'll try that tomarrow when I get home in the morning.

[GMCJOE]

No problem. I read about it while I was researching my speaker issue. If it doesn't work, then you will have the new one.

[redracer95]

I finally got the stop light switch replaced when I got home this morning. And whadda you know the cruise control works!!!! WOOHOOO! thanks for all the help you guys!

I did notice that for the last week and a half that when I pressed the brake pedal the brake lights would light up but not stay on unless I pressed hard on the pedal. Since the switch is replaced now the problem is gone.

[Low Elco]

Thanks, Joe! Having the same problem, need to get on it.

[Woogeroo]

mcmlxix,

nice ride.

I like the GMC front end a lot better than the Chevy on that body style.

-W

[mcmlxix]

Thanks W -

I need to wash the truck... but I added white mirror caps and white door handles... Sill need to remove the 1" rear block and install the rear drop shackles... that should at least level the truck out... but it still looks live a 4x4....

[solidaxel]

Originally Posted by mcmlxix

Thanks W -

I need to wash the truck... but I added white mirror caps and white door handles... Sill need to remove the 1" rear block and install the rear drop shackles... that should at least level the truck out... but it still looks live a 4x4....

Have you changed you rear shackles?
I have a set on my 03 which I think are the same and I will trade you if you are interested, mine sits too low and bottoms out,it needs the frame noched, maybe later!

[Woogeroo]

We of course, require new photos.

*smIrk*

-W

[mcmlxix]

When I got the truck the front chrome bumper had a good little dent in it... I bought a cheap aftermarket replacement and then had the three pieces covered in color matched and UV coated Line-X..... heres the shot at dusk just afer I finished bolting everything back up... I left the two hooks off and had some aluminum plates cut to cover the holes and mount some LED running lights. (you can also see the white mirror caps in this pic)

I also picked up a set of McGhaugys 2" drop spindles off CL that I haven't had the chance to install yet and a new set of rear U bolts to remove the 1" lift block. That will gove me 2" drop in fron and 3" in the rear... that still leaves the rear too high to be level ... oh well...

Once I get my 72 Blazer done, I'm going to sell the Sierra and restore a 1973 Mercedes-Benz 280SEL I have waiting patiently... so I REALLY can't spend more money....