IMPROVED HEAT (REPLACE HEATER CORE)

Model and Year: 1988-89 C, K TRUCKS

Some owners of 1988-89 C/K trucks may comment regarding a lack of sufficient heat from their heaters. For improved heating, a revised heater core has been released to production after the following VIN breakpoints that will increase heater output 5 - 8 degrees F (2.5 - 4.5 degrees C).

OSHAWA 2GCGK29K3K1212682

FT. WAYNE 1GCDC14K2KZ239512

PONTIAC 1GCFK24KOKE232454

The new heater core has 38 fins/inch verses 30 fins/inch on the old heater core. Some reduction in air flow may be noticed.

Parts are currently available from GMSPO.

Base heater 52452918

With A/C or Deluxe heater 52452915

For repairs to vehicles under warranty use the appropriate labor operations and times from the labor time guide.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.