S15/T15 2WD Jimmy L4-151 2.5L (1985)
Dashboard / Instrument Panel: All Technical Service Bulletins
Windshield - Cowl Popping Noise From Pillar Area
BULLETIN NUMBER:
93-2-16
SECTION:
2
NUMBER:
1
CORPORATE
REFERENCE NUMBER:
262001
DATE:
October 1992
SUBJECT:
"POP" NOISE FROM WINDSHIELD PILLAR AREA
MODELS:
1983-93 S/T TRUCKS
REFERENCE COWL "POP" TAPPING NOISE GMC TRUCK SERVICE BULLETIN NUMBER 91-2-122 (CORPORATE NUMBER 162001R),
GROUP 2-FRAME-BUMPER-SHEET METAL, DATED JULY 1991.
Owners of some 1983-93 S/T Pickups and Utilities may comment on a cowl "pop" noise transmitted through the "A" pillar. It has been determined that
sections other than the windshield cowl area may produce a sound which imitates cowl "pop".
PRIOR TO PERFORMING ANY CORRECTION FOR COWL "POP" TAPPING NOISES, VERIFY THE SOURCE OF THE NOISE(S) TO
DETERMINE IF IT IS A VALID COWL "POP" CONDITION.
Possible noise areas to check are:
-
Instrument panel "pop"/noise.
-
Loose door lock rods.
-
Loose wires/harnesses contacting the wall of the engine/passenger compartment (cowl).
-
A lack of door hinge lubrication.
-
An Electronic Control Module (ECM) bracket "pop".
-
An ash tray rattle.
-
An air vent squeak.
-
Hood hinge "flutter"/rattle.
INFORMATION
1.
INSTRUMENT PANEL (I/P) "POP"/NOISE sound at the front edge of the I/P may occur if the I/P pad rubs against the cowl/dash support panel.
Refer to "Instrument Panel Pad to Cowl Panel "Itch" Noise Truck Service Bulletin GMC Number 92-10-130, Group 10-Body Section, Corporate
Number 261610, dated September 1992.
2.
LOOSE DOOR LOCK RODS may vibrate during vehicle operation creating a rattle type noise.
Refer to "Front Door Lock Rod Rattle" Truck Service Bulletin GMC Number 91-10-144, Group 10-Body Section, Corporate Number 161603, dated
September 1991.
Also refer to "Unwanted Sound: Squeaks and Rattles Diagnosis and Correction" Reference Manual.