K 10 1/2 Ton Pickup 4WD L6-250 4.1L VIN D 2-bbl (1983)
Voltage Regulator: All Technical Service Bulletins
Campaign - Voltage Regulator Replacement
Number:
84C13
Section:
6D
Date:
July, 1984
Subject:
PRODUCT CAMPAIGN 84C13 78 AMP DELCOTRON GENERATOR REGULATOR FAILS
Model and Year:
1983-1984 S/T 10 SERIES CHEVROLET BLAZER MODELS EQUIPPED WITH RPO'S C60 AIR CONDITIONING AND C49 REAR WINDOW
DEFOGGER, 1983-1984 C/K10, 20 SERIES SUBURBAN MODELS EQUIPPED WITH RPO'S C36 REAR AUXILIARY HEATER AND C49 REAR
WINDOW DEFOGGER
TO:
ALL CHEVROLET DEALERS
General Motors has determined that some 1983-1984 S/T 10 series Blazer and CK 10-20 series Suburban models, equipped with the 78 Amp Delcotron
generator may be subject to voltage regulator failure under certain conditions of temperature, load, and engine/generator speed. The resulting failure of
the voltage regulator can cause high system voltage and lead to loss of generator output.
To prevent the possibility of this inconvenience occurring, it will be necessary to replace the voltage regulator with one that is not affected by
temperature, load, and engine/generator speed conditions.
VEHICLES INVOLVED
Involved are certain 1983-1984 S/T 10 series Blazer models equipped with RPO'S C60 air conditioning and C49 rear window defogger. Vehicles with
this option combination have the 78 Amp Delcotron generator. These vehicles were built within the following VIN Breakpoints:
Year
Plant
From
Through
1983
Pontiac
D0100010
D0176414
Shreveport
D8129448
D8180664
1984
Pontiac
E0100001
E0157783
Shreveport
E8100008
E8196202
Also involved are certain 1983-1984 C/K 10-20 series Suburban models equipped with RPO'S C36 rear auxiliary heater and C49 rear window defogger.
Vehicles with this option combination have the 78 Amp Delcotron generator. These vehicles were built within the following VIN breakpoints:
Number
: 84C13
Section
:
6D
Page No.
:
2
VEHICLES INVOLVED (CONT'D)
Year
Plant
From
Through
1983
Flint
DF100003
DF163819
1984
Flint
EF100471
EF156216
Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle
Identification Number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data
furnished will enable dealers to follow-up with owners involved in this campaign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle
registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up
necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin was not shipped any involved vehicles.
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of Owner Letter included with this bulletin).
DEALER CAMPAIGN RESPONSIBILITY
Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time
forward.