Delta 88 V8-350 5.7L DSL (1985)
A/C Pressure Sensor/Switch - Cooling Fan: Customer Interest
A/T - Insufficient Cooling at Idle/Slow Moving Traffic
SUBJECT
INSUFFICIENT AIR CONDITIONING COOLING
NUMBER: 86-T-37A
DURING IDLE/SLOW MOVING TRAFFIC CONDITIONS OR ON STEEP GRADES IN HOT
AMBIENT TEMPERATURES
DATE: August 8, 1986
MODELS/YEARS
1985-86 NINETY-EIGHT AND 1986
TORONADO AND DELTA 88
SECTION: 1B
This bulletin supercedes Dealer Technical Bulletin 86-T-37 dated June 9,1986.
When a 1985 or 1986 model car listed above is operated at high ambient temperatures with the air conditioning on and under operating conditions such
as driving up long, steep highway grades, idling the engine, or driving in congested city traffic, the driver may experience intermittent reduced air
conditioning performance.
This reduced air conditioning performance may be the result of insufficient air flow through the condenser core. To improve this air flow, a new coolant
fan air conditioning pressure switch, with lower turn-on pressure, went into production effective with the following serial numbers:
Assembly Plant
Plant Code
VIN Breakpoint
Delta 88
Wentzville
1
Start of Production
Willow Run
W
GW307568
Ninety-Eight
Lake Orion
4
G4317393
Wentzville
1
G1312436
Toronado
Hamtramack
U
GU308905
To repair this condition on vehicles built before the breakpoints listed, replace the coolant fan air conditioning pressure switch with part number
25527510 (black plastic case).