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Service bulletins for the 2008 Peterbilt 320

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

22 on file from NHTSA, as of 2026-10-19.

By type

By component

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Bulletins, newest first
42-0702026-10-17. Service bulletin. UNKNOWN OR OTHER. Due to supplier constraints, an authorized aftermarket surge tank has been made available.
P0012026-09-29. Service bulletin. ENGINE. "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
02-1602021-03-10. Service bulletin. VISIBILITY; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY:WINDSHIELD WIPER/WASHER. Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
32-0152020-07-03. Service bulletin. ELECTRICAL SYSTEM. Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
43-0672020-07-03. Service bulletin. STRUCTURE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and built from 03/6/2006 to 1/20/2020, the clamps that secure the SOC exhaust stacks may not be tightened properly. This may allow the exhaust stack to rotate and contact the cab or sleeper.
11-0012020-06-02. Service bulletin. POWER TRAIN. Information only: Hendrickson Softek front axle maintenance intervals and requirements.
34-0852020-04-03. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.
32-0162020-04-03. Service bulletin. EQUIPMENT. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
34-0852020-03-04. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Information Only: Vehicles may have the connector seal on the wheel speed sensor incorrectly installed, which may lead to sensor corrosion.
02-1532019-12-04. Service bulletin. STRUCTURE. Information only: Some model 320 and 520 vehicles built before 3/11/2019 may experience loss or loosening of doghouse insulation. Reference the procedure in the attachment section to properly remove and replace the insulation.
01-0752019-12-04. Service bulletin. ENGINE AND ENGINE COOLING. Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor.
19PBC2019-08-02. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Safety Recall: Vehicles fail to confirm with FMVSS/CMVSS No 108 Table 1-a requirements which requires 2 red stop lamps. Vehicles were equipped with additional amber stop lamps which may illuminate when the brake is applied, and may confuse other drivers. Resolution is to remove the amber stop lamps and associated wiring.
34-0662019-07-08. Service bulletin. ELECTRICAL SYSTEM. Information Only - Quick Reference Guide for Electric harness damage repairs.
34-0772019-05-13. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
13-0492019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Information: Bendix ACOM Software version 6.16.5.0 for diagnostics may introduce an unrecoverable error. Notice to dealers to replace this version with older software version until Bendix introduces new version.
03-0642018-08-13. Service bulletin. ELECTRICAL SYSTEM. Information - Recommended Practices for Updating ESA Software
15-162017-10-12. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser.
81102010-08-26. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:ENGINE. CUMMINS ISX, OR CUMMINS ISM ENGINES EXPERIENCING A PREMATURE FAILURE OF THE FAN HUB BEARINGS. *KB
FRN-808-12009-01-28. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR; ELECTRICAL SYSTEM. PETERBILT TRUCKS: THE ELECTRICAL SYSTEM MAY SHUT DOWN DUE TO A POWER SURGE. WHEN THIS OCCURS, THE GREEN LIGHT ON THE COMFORTCLASS CONTROL PANEL TURNS TO RED. *PE
808-42008-12-09. Service bulletin. WHEELS; SERVICE BRAKES, AIR. PETERBILT TRUCKS SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CERTAIN PETERBILT TRUCKS MANUFACTURED WITH UNDER TORQUED BRAKE ASSEMBLY MOUNTING BOLTS ON HENDRICKSON 8,000 LB PUSHER AXLES. CSC LETTER WAS RECEIVED. *PE
608-12008-11-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. PETERBILT: TRUCKS BUILT WITH CUMMINS ISL ENGINES BETWEEN 1/16/08-6/10/08. DUE TO A MATERIAL ERROR, CERTAIN VEHICLES ORDERED WITH OPTIONAL C-BRAKE BY CUMMINS (OPTION CODE NUMBER 2812140) DID NOT RECEIVE A C-BRAKE ON THE ENGINE. *PE
408-22008-07-29. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. PETERBILT SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. MODEL 320 LOW COOLANT SENSOR. THIS FIELD REPAIR NOTICE IS APPLICABLE TO CERTAIN PETERBILT MODEL 320 VEHICLES BUILT BETWEEN OCTOBER 4, 2007 AND JANUARY 24, 2008 WITH CATERPILLAR C13 ENGINES. CSC WAS RECEIVED. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.