Problems owners report
Complaints filed with NHTSA about the 2001 GMC C Series, by the system named in each complaint. One complaint can name several.
- Service brakes, hydraulic1
- Parking brake1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
Recalls
VEHICLE DESCRIPTION: PICKUP AND UTILITY TRUCKS. SOME OF THESE VEHICLES HAVE AN INTERNAL COMPONENT IN THE OUTBOARD SEAT BELT RETRACTORS FOR THE 2ND AND 3RD ROW OF SEATS THAT COULD BE CRACKED. WITH REPEATED ACTUATION OF THE LOCKING MECHANISM, THE CRACK COULD SPREAD TO THE POINT SUCH THAT THE SEAT BELT WOULD NO LONGER LOCK.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What GMC told its dealers about the 2001 GMC C Series: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 634956 | CONCERNS WITH INTERMITTENT ENGINE NO CRANK, WHEN THE CLUTCH IS APPLIED.*TT |
| 634909 | SUBJECT REGARDING TIE ROD REPLACEMENT- INNER PROCEDURE. *TT |
| 634907 | TECHNICAL SERVICE INFORMATION ON ANTILOCK BRAKE SYSTEM (ABS) INDICATOR ILLUMINATES WHEN POWER TAKEOFF (PTO) IS ENGAGED. *TT |
| 634903 | SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE B2725. *TT |
| 634901 | SUBJECT REGARDING REVISED WHEEL BEARING ADJUSTMENT PROCEDURE. *TT |
| 634850 | SOME CUSTOMERS AND DEALERS MAY COMMENT ON ACCELERATED UNEVEN BRAKE PAD WEAR ON SOME VEHICLE WITH FOUR-PISTON FIXED CALIPER REAR DISC BRAKES. *TT |
| 634831 | SUBJECT REGARDING HIGHER THAN EXPECTED ENGINE OIL CONSUMPTION. *TT |
| 634716 | OIL LEAK AT OIL COOLER TO ENGINE BLOCK MATING SURFACE (REPLACE O-RINGS, APPLY SEALANT). *TT UPDATED *EH UPDATED 6/17/08. *NJ |
| 634712 | INFORMATION ON VEHICLES EXHIBITING A RANDOM ENGINE TICKING NOISE. *TT |
| 634298 | SUBJECT REGARDING LOW OIL PRESSURE AND NEW OIL LEVEL INDICATOR. NLM |
| 631973 | SUBJECT REGARDING THE AVAILABILITY OF PICKUP BOX REINFORCEMENT KITS FOR TOOLBOX/REAR WINDOW BARRIER/LADDER RACK APPLICATIONS. *SLC |
| 631239 | SOME CUSTOMERS MAY COMMENT THAT THE REAR DOOR WINDOW IS INOPERATIVE. *SLC |
| 629718 | SOME VEHICLES MAY COMMENT ON CONTINUED OIL CONSUMPTION WITH BLUE OR WHITISH SMOKE ON START UP. *TT |
| 629530 | SUBJECT REGARDING SERVICE DIAGNOSIS/RECOMMENDATIONS FOR INOPERATIVE AIR CONDITIONING SYSTEMS. *TT |
| 629525 | SOME CUSTOMERS MAY COMMENT ON A RESONATING NOISE OR VIBRATION IN THE PASSENGER COMPARTMENT WITH A/C ON BETWEEN 2000 - 2400 RPM. *TT |
| 629495 | SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVICE MANUAL INFORMATION. *TT |
| 629454 | SOME OWNERS OF CERTAIN PICKUP MODELS MAY COMMENT ON AN ACCESSORY DRIVE NOISE. *TT |
| 628945 | SOME CUSTOMERS AND DEALERS MAY COMMENT ON ACCELERATED UNEVEN BRAKE PAD WEAR ON F6-7 MEDIUM DUTY TILT CAB MODELS AND H6-7 CONVENTIONAL MEDIUM DUTY MODELS. *TT |
| 628938 | INFORMATION USED WHEN DIAGNOSING NOISE CONDITIONS SUCH AS ENGINE RATTLE NOISE, SPARK KNOCK AT 2000 - 2500 RPM RANGE, UNDER A MODERATE TO HEAVY LOAD WITH A WARMED UP ENGINE. *TT |
| 628936 | PICKUP BOX SHEET METAL FRACTURES/DAMAGE WHEN USING AFTERMARKET ACCESSORIES SUCH AS TOOL BOXES, WINDOW BARRIER AND LADDER RACKS. *TT |
| 628932 | SOME CUSTOMERS MAY COMMENT ON EXCESSIVE NOISE FROM THE ENGINE COMPARTMENT WITH THE AIR CONDITIONER ON, AIR CONDITIONER INOPERATIVE. *TT |
| 628905 | SOME CUSTOMERS MAY COMMENT ON ROUGH IDLE AFTER START UP, ESPECIALLY AFTER SETTING OVERNIGHT. *TT |
| 628898 | SOME CUSTOMERS MAY COMMENT ON HIGHER THAN EXPECTED ENGINE OIL CONSUMPTION. *TT |
| 628896 | SOME VEHICLES MAY EXHIBIT AN ENGINE KNOCK NOISE ON COLD START. *TT |
| 627831 | INFORMATION REGARDING NOISE OR VIBRATION IN PASSENGER COMPARTMENT WITH A/C ON BETWEEN 2000-2400 RPM. *YH |
NHTSA manufacturer communications (public domain)
NHTSA investigations
PARKING BRAKE FAILURE
PARKING BRAKE FAILURE
NHTSA Office of Defects Investigation