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Title: Problem with Air suspension GMC 4905
Post by: chriss on August 12, 2008, 12:58:19 PM

I have a 79 GMC 4905 and the front airbags won't inflate when I start it. the rear airbags inflate as normal, but not the front. Any suggestions would be greatly appreciated.

thanks,
Chris

Title: Re: Problem with Air suspension GMC 4905
Post by: FloridaCliff on August 12, 2008, 01:05:08 PM

Chris,

Do your gauges show (Both Needles) that you are up to 120 psi after a reasonable time?

If no air leaks, you have one leveling valve for the front, either stuck, arm bent or not passing air?

Let me know.....

Cliff

Title: Re: Problem with Air suspension GMC 4905
Post by: kingfa39 on August 12, 2008, 01:06:24 PM

i would take a look at the front leveling valve, could be stuck or disconnected, if you get under it make sure its properly blocked up.
Frank allen

Title: Re: Problem with Air suspension GMC 4905
Post by: chriss on August 12, 2008, 02:06:49 PM

both needles are up to 120psi. where is the leveling valve located? sounds like that would be the problem.

thanks,

Chris

Title: Re: Problem with Air suspension GMC 4905
Post by: beatsworkin on August 12, 2008, 02:31:32 PM

Front leveling valve is located about center just behind front axle. I just had same problem with my 4905. Luke had the part

Red

Title: Re: Problem with Air suspension GMC 4905
Post by: chriss on August 12, 2008, 03:18:36 PM

Thanks Red!

I'll give it a shot.

Chris

Title: Re: Problem with Air suspension GMC 4905
Post by: tekebird on August 12, 2008, 03:46:23 PM

save yourself shipping, any truck parts place will have a leveling valve

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