All 1989 Sunbird and Grand Am service manuals recommend the use of J 37097 Hose Clamp Pliers when replacing heater hoses. J 37097 will ONLY work on Bonneville models.
When replacing heater hoses on Sunbird and Grand Am vehicles, use Kent-Moore available tool J 38185, Blue-Point HCI10 or other equivalent hose clamp pliers. Please mark a reference to this information in your Service Manuals at page:
Pontiac Sunbird 1A-17, 18; 1B-43, 46 Pontiac Grand AM 1A-16, 19; 1B-49
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.