2006 GMC Topkick problems

Defect

ON CERTAIN MEDIUM DUTY TRUCKS EQUIPPED WITH ZF MODEL 8018 STEERING GEARS, THE STEERING GEAR MAY HAVE BEEN PRODUCED INCORRECTLY. A STEERING GEAR WITH THIS CONDITION MAY PRODUCE THE FEELING OF HITTING A CURB AND A CRACKING OR PINGING SOUND WHEN THE STEERING WHEEL IS TURNED.

Consequence

THE STEERING WHEEL POSITION MAY BE OFF-CENTER AND INCREASED EFFORT MAY BE REQUIRED WHEN TURNING, INCREASING THE RISK OF A CRASH.

Remedy

DEALERS WILL INSPECT FOR CERTAIN DATE CODES AND VERIFY THE MILEAGE ON STEERING GEARS AND REPLACE GEARS AS NECESSARY. THE RECALL BEGAN ON OCTOBER 25, 2007. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438; GMC AT 1-866-996-9463; OR ISUZU AT 1-800-255-6727.

Defect

ON CERTAIN STRAIGHT TOWING OR NON-TOWING TRUCKS EQUIPPED WITH BENDIX AIR BRAKES, THE AIR BRAKE PARK CONTROL VALVE MAY DEVELOP EITHER AN INTERNAL AIR LEAK OR AN AIR RESTRICTION. THE PARK BRAKE MAY NOT RELEASE OR MAY RELEASE ONLY PARTIALLY.

Consequence

IF THE VEHICLE IS ON AN UNEVEN SURFACE, THE PARK BRAKE MAY NOT HOLD THE VEHICLE AND COULD RESULT IN UNINTENDED VEHICLE MOVEMENT AND A VEHICLE CRASH. THIS CONDITION DOES NOT AFFECT NORMAL SERVICE BRAKING.

Remedy

DEALERS WILL INSPECT AND REPLACE THE EXTERNAL CHECK VALVE ON THE AIR BRAKE PARK CONTROL VALVE IF THE INSPECTION DETERMINES THE EXTERNAL CHECK VALVE IS DAMAGED, THE AIR BRAKE PARK CONTROL VALVE WILL BE REPLACED AND MAY REQUIRE THE REPLACEMENT OF AN INTERNAL CHECK VALVE IN THE AIR BRAKE PARK CONTROL VALVE. REMEDY WILL BE FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 22, 2007. OWNERS MAY CONTACT GM AT 1-800-862-4389 OR ISUZU AT 1-800-255-6727.

Defect

CERTAIN TRUCKS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS." AN INTERNAL CONTROL AND CHECK VALVE WITHIN THE AIR BRAKE APPLICATION VALVE ASSEMBLY WAS CONFIGURED IMPROPERLY, PREVENTING AIR FROM FLOWING THROUGH THE BRAKE SYSTEM AS DESIGNED. IN THE EVENT OF AN EMERGENCY STOP, THE VEHICLE'S STOPPING DISTANCE WOULD BE INCREASED.

Consequence

IF STOPPING DISTANCE WAS LIMITED, A VEHICLE CRASH COULD RESULT.

Remedy

DEALERS WILL REPLACE THE AIR BRAKE APPLICATION VALVE ASSEMBLY ON C-SERIES OR REROUTE THE AIR BRAKE LINES ON T-SERIES FREE OF CHARGE. THE RECALL BEGAN ON SEPTEMBER 20, 2006. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463 AND ISUZU AT 1-800-255-6727.

Defect

CERTAIN MEDIUM DUTY TRUCKS EQUIPPED SR-7 BENDIX BRAKE VALVES, THE CHECK VALVE INSIDE THE VALVE CAVITY MAY NOT PROPERLY SET, CAUSING INTERNAL AIR LEAKAGE. IF THE CHECK VALVE DOES NOT PROPERLY SEAT, THE RESULTING LEAKAGE CAN CAUSE A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER OPERATOR PULLS THE DASH VALVE BUTTON.

Consequence

THE DELAYED PARKING BRAKE APPLICATION CAN OCCUR WITHOUT WARNING, LEADING TO UNINTENDED VEHICLE ROLLAWAY INCREASING THE RISK OF A CRASH.

Remedy

DEALERS WILL INSPECT THE VALVES AND REPLACE IT FREE OF CHARGE. THE RECALL BEGAN ON JULY 31, 2006. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, OR ISUZU AT 1-800-255-6727.