Manual Temp Control Lever - Slips From Hot To Cold

Group Ref.: HVAC

Bulletin No.: 461101

Date: May, 1994

SUBJECT:
MANUAL TEMPERATURE CONTROL LEVER SLIPS FROM HOT TO COLD
(INSTALL E RING)

MODELS:
1988-94 CHEVROLET AND GMC TRUCK C/K TRUCKS
1990-94 CHEVROLET AND GMC TRUCK TOPKICK/KODIAK AND P6, B7 CHASSIS MODELS WITHOUT AIR CONDITIONING (C60)

CONDITION:

Some owners may comment that the temperature control lever slips from hot to cold, usually when blower motor is on high speed.

CAUSE:





Too much vertical movement at the lever arm pivot shaft (Figure 1).

CORRECTION:





Shim clearance at the pivot shaft by installing an "E" Ring clip between the metal and silicone washers already present on the shaft (Figure 2).

SERVICE PARTS INFORMATION:

P/N Description QTY

9431762 "E" Ring Clip 1

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

For vehicles repaired under warranty, use:

Labor
Operation Description Labor Time

D0360 Control Assembly, Use Published
Heater (non A/C) Labor Operation
R&R Time