For 1990-2009 cars

# LACK OF POWER AFTER A PERIOD OF SUSTAINED DRIVING IN LIGHT

#### SUBJECT: LACK OF POWER AFTER A PERIOD OF SUSTAINED DRIVING IN LIGHT SNOW (INSTALL SNOW INTRUSION KIT)

#### MODELS: 1996-97 GEO TRACKER 1998 CHEVROLET TRACKER

#### CONDITION:

SOME CUSTOMERS MAY COMMENT ON POOR PERFORMANCE OR LACK OF POWER AFTER A PERIOD OF SUSTAINED DRIVING IN LIGHT SNOW.

#### CAUSE:

THE CONDITION MAY BE DUE TO LIGHT SNOW ENTERING THE AIR CLEANER THROUGH THE INDUCTION SYSTEM. HEAVY SNOW IS UNLIKELY TO ENTER, AS IT IS TOO HEAVY TO NEGOTIATE THE VARIOUS TURNS OF THE AIR PATH. USUALLY, CONTINUOUS DRIVING AT HIGHWAY SPEEDS IS REQUIRED TO CAUSE ENOUGH SNOW ACCUMULATION TO INTERFERE WITH THE INTAKE OF AIR TO THE ENGINE. SHORTER TRIPS ALLOW THE SNOW TO MELT WHILE THE VEHICLE IS PARKED. THEREFORE, SUSPECT VEHICLES SHOULD HAVE THE AIR CLEANER INSPECTED FOR SNOW AS SOON AS POSSIBLE. IF THE VEHICLE IS ALLOWED TO SIT FOR A PROLONGED PERIOD OF TIME, THE SNOW WILL MELT, THUS RESULTING IN A DIAGNOSIS OF NO TROUBLE FOUND.

#### CORRECTION:

A SNOW INTRUSION KIT (P/N 91174254) HAS BEEN RELEASED WHICH CONTAINS PARTS THAT WILL BLOCK THE SNOW FROM TRAVELING TO THE AIR CLEANER. FOLLOW THE SERVICE MANUAL PROCEDURE FOR REMOVING THE GRILL AND INSTALL THE SNOW INTRUSION KIT. SEE FIGURE 1.

#### PARTS INFORMATION:

P/N DESCRIPTION ==================== ===============================

91174254 SNOW INTRUSION KIT

PARTS ARE EXPECTED TO BE AVAILABLE FROM GMSPO, 4/6/98.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION LABOR OPERATION NUMBER TIME ================= =================

B1308 0.2 HR

FIGURES: 01

ATTACHMENTS: 00

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

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