A/C - Delayed or Insufficient Interior Cooling At Idle
88pontiac14Bulletin Number: 88-1-4B
Reference Number: 871201R
Publish Date: 8/88
Subject: DELAYED AND/OR INSUFFICIENT INTERIOR COOLING AT IDLE
Models
Affected: 1988 SUNBIRD EQUIPPED WITH 2.0L (VIN CODE K) LT2 4 CYLINDER ENGINE
"This bulletin supersedes bulletin 88-1-4A, dated 2/88. This bulletin is being revised to indicate the correct manual transaxle prom number."
Some early-built 1988 Sunbird models may exhibit delayed and/or insufficient cooling with the air conditioning mode selected. This is due to the engine cooling fan not operating in the A/C mode when the outside air temperatures is below 85~ F.
This condition can be addressed by installing the following service PROMS:
Automatic Manual
Transaxle Transaxle
PROM # PROM #
16086125 16089813
Vehicles are currently being produced with corrected PROMS, beginning with the following VIN breakpoints:
Automatic Manual
TRANSAXLE TRANSAXLE
VIN Breakpoint VIN Breakpoint
J7500363 J7525993
Use applicable labor time and operation number.