Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
1999 PETERBILT 379 WITH A DETROIT 12.7. OPENED THE FUEL
1999 PETERBILT 379 WITH A DETROIT 12.7. OPENED THE FUEL WATER SEPARATOR TO DRAIN THE WATER AND ENDED UP WITH AIR IN THE LINES. TRUCK WONT START AGAIN. HOW CAN I PRIME THE FUEL SYSTEM ON THIS ENGINE SI… read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
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I owen a 03 peterbilt 379,i m having a problem that i can't
Good afternoon... i owen a 03 peterbilt 379,i m having a problem that i can't figure it out,when i apply the break there no air going to my trailer breaks,the air back goes up all works normal but no … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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2005 Peterbilt 379. What would cause my fuel be forced into
2005 Peterbilt 379. What would cause my fuel be forced into the passenger tank to the point that it is over full but the driver side tank is empty. When this happens the truck runs out of fuel because… read more
Mike Mcmillan
Mike Mcmillan
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I have an 1999 Peterbilt 379 with a Detroit Series 60 11 1L
Hello, I have an 1999 Peterbilt 379 with a Detroit Series 60 11 1L engine. This morning the air dryer started to purge constantly every 30 seconds. Once the pressure is built up the air dryer purges a… read more
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I'm having with air pressure on a 379 Pete with vin #
I'm having with air pressure on a 379 Pete with vin # ***************** it's only building 90 psi on primary side no air leaks and I have tried a new compressor, still 90 psi no secondary at all no ai… read more
Mike Mcmillan
Mike Mcmillan
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I am having the same problem with my fuel tanks not
I am having the same problem with my fuel tanks not leveling. The passenger side would not go down. My mechanic replaced all three fuel lines and the fuel splitter valve and now the driver side will n… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
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I have a air pressure problem on my Mac truck. It does not
I have a air pressure problem on my Mac truck. It does not generate enough air pressure on the primary side there is a 40 pound difference between the primary and secondary and when we work the truck … read more
Mike Mcmillan
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I have a 2003 Peterbilt 379 cab and it keeps burning out the
I have a 2003 Peterbilt 379 cab and it keeps burning out the brake light switch … read more
Kent Van Wagner
Kent Van Wagner
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I have an 07 Peterbilt with a cat engine. My air gauges are
I have an 07 Peterbilt with a cat engine. My air gauges are not going up. The buzzer is going off. Both primary and secondary. What is the first step… read more
Andy
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truck /coach technician
Vocational, Technical or Trade School
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Where is the low air pressure buzzer located on a 2009 379
Where is the low air pressure buzzer located on a 2009 379 Peterbilt? … read more
John Oliver
John Oliver
none
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I VE GOT A 2000 PETERBILT 379 TRUCK IS NOT BUILDING AIR PRESSURE
I VE GOT A 2000 PETERBILT 379 TRUCK IS NOT BUILDING AIR PRESSURE IT WAS BUILDING PRESSURE THEN STOPPED. IT WOULD BUILD TO THIRTY SOMETIMES IT WOULDNT BUILD AT ALL. YOU WOULD HAVE TO WAIT CUT THE TRUCK… read more
Wayne
Wayne
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Peterbilt 379: I am currently driving a 2007-379. VIN IXP-5DBOX-6-7N66
I am currently driving a 2007-379. VIN IXP-5DBOX-6-7N666102. 580,000 miles. Heavy Spec. With an Air Trac suspension. The air bag pedestals appear warped/stressed on the top where they fasten to the fr… read more
JANECZFJ
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2007 379 conventional peterbilt spec for step deck
what is the height off the ground of the step deck on the passenger side of a 2007 peterbilt conventional 379?… read more
Cat Man
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I have a 97 peterbilt 379 with a 3406e cat, for some reson
I have a 97 peterbilt 379 with a 3406e cat, for some reson my fuel tanks wont level, the other day, I still had 1/4 tank in the driver side, but the truck shut off while going down the road because th… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
When I parked it for vacation, everything worked fine, when
When I parked it for vacation, everything worked fine, when I cranked it this morning I noticed that the air will not build up on what I think is the secondary side. On the air guage the red needle ru… read more
Wayne
Wayne
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Vocational, Technical or Trade Scho
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On my 2003 peterbilt 379 when I put my lights on high beam
On my 2003 peterbilt 379 when I put my lights on high beam I've got high beam only on driver side and low beam on passenger side. I've replaced turn signal/dimmer switch. Same results.… read more
JCTech
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I have a 1988 379 Peterbilt and the fuse panel is badHow
I have a 1988 379 Peterbilt and the fuse panel is bad How would you go about replacing the fuse panel? Can you get a complete panel aftermarket or original?… read more
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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