Safari Van M V6-262 4.3L (1985)
GMC NUMBER:
85-T-105
SECTION:
6C - Engine Fuel
DATE:
December, 1986
SUBJECT:
REVISED FAST IDLE ADJUSTMENT SPEEDS
MODELS:
1985 M VAN WITH 4.3L V6 (VIN CODE N) AND AUTOMATIC TRANSMISSIONS
THIS BULLETIN CANCELS AND SUPERCEDES CHEVROLET DEALER SERVICE BULLETIN 85-209 DATED JULY, 1986, ALL COPIES OF
WHICH SHOULD BE DESTROYED.
Some 1985 M vans equipped with the 4.3L V6 engine and automatic transmissions may experience harshness when shifting from Park or Neutral into
gear. This condition only occurs when the engine is on fast idle (cold engines) and the engine fast idle speed is set at 2200 rpm.
Figure 1 - Fast Idle Specifications Label
This condition can be improved by lowering the fast idle speed to 1800 rpm. Refer to the vehicle emission (tune-up) label for the proper procedure for
fast idle adjustment (See Figure No. 1).
Whenever this procedure is performed, it is also necessary to install a new revised fast idle specification label, P/N 10066489, adjacent to the Emission
Label (See Figure No. 1).
LABEL INSTALLATION PROCEDURE
1.
Locate area where label is to be attached.
2.
Clean area where label is to be attached using GM fabric cleaner, P/N 1050244, or GM choke cleaner, P/N 1050494, or equivalents.
3.
Position label on fan shroud, as shown, with print in an upright position, readable from the front of the vehicle.
If additional labels (P/N 10066489) are required, they can be obtained for a nominal fee from:
Adistra Corporation
P.O. Box 56006
Pontiac, AH 48056-9099
Attn:
GMC Service Publications
Technical Service Bulletin # 86T2185
Date: 870201
Rear Wheels - Unable to Stop Turning on Icy Surfaces
CHEVROLET NUMBER: 86-T-218
SECTION:
5 - Brakes
DATE:
February, 1987
SUBJECT:
REAR WHEELS TURN ON ICE
MODELS:
1985-86 SAFARI/ASTRO VANS WITH 4.3L ENGINE AND AUTOMATIC TRANSMISSION