GMC IRS
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MNspiderman
GMC IRS
A few times in the past year I was driving down the freeway here in the twin cities and noticed a few GMC full sized pickup trucks with the rear wheels pushed out a bit. Then I noticed that they had an Independent Rear Suspension. I'd say I seen at least 6 of these in the last year. Anyone have any insight on this? I googled GMC IRS and such but come up with nothing. It looks like a factory installed item too.
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halg
Re: GMC IRS
Not sure if they are true IRS or just the rear steer units they put on some trucks.
Hal
Hal
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adrians
- Posts: 851
- Joined: Tue Jan 15, 2008 6:07 am
- Your car is a: 1981 Spider Turbo - missing the turbo
- Location: Sydney - Australia
Re: GMC IRS
You mean they gone beyond leaf springs ! 
THE FLEET
2014 Abarth "SS"
1981 Spider 2000 (Legend Industries Turbo - minus the Turbo)
1978 X1/9 1.3 Dual IDF 40's, Coupe Cam, Allison Header/Exhaust
1971 128 Sedan 1100cc, Coupe Cam/Headers
Motokhana Special 127 rear engined Rail 903cc
2014 Abarth "SS"
1981 Spider 2000 (Legend Industries Turbo - minus the Turbo)
1978 X1/9 1.3 Dual IDF 40's, Coupe Cam, Allison Header/Exhaust
1971 128 Sedan 1100cc, Coupe Cam/Headers
Motokhana Special 127 rear engined Rail 903cc
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Gunsmith
Re: GMC IRS
I remember them advertising those a couple of years ago. Was so pricey nobody bought them. I looked at the sticker on one truck and it was in the high 50's needless to say I did not hunt down a salesman to see "what he could do to put me in that truck today?"
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MNspiderman
Re: GMC IRS
So then to sum it up. Its a solid axle with spindles, thats why its wider? The tie rods are on the back of the axle = thats why it looks like independent suspension? Is this what your saying or does it also have independent suspension with coils? I didn't get that close of a look because I sit about 9' in the air in my work truck. Still digging for the truth here.
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MNspiderman
Re: GMC IRS
Alright i googled gmc 4 wheel steer.
its called Q-Steer. Its a leaf spring rear end. over 80" wide so requires side markers. its from 2002/3. it starts out at $54,999. higher for the gmc model. its electric and only works at slow speed for obvious reasons. can you imagine driving a forklift at 70mph and slightly hitting the steering wheel. Whewwwwww. I solved my own case, almost.
its called Q-Steer. Its a leaf spring rear end. over 80" wide so requires side markers. its from 2002/3. it starts out at $54,999. higher for the gmc model. its electric and only works at slow speed for obvious reasons. can you imagine driving a forklift at 70mph and slightly hitting the steering wheel. Whewwwwww. I solved my own case, almost.