STALL AFTER START UP/NO START CODE 26/62 BLOWN ECM FUSE

Models Affected: 1990 GRAND AM MODELS WITH 2.3L LD2 VIN D, 3T40 (125C)

During the start of 1990 production through VIN LC238417, some 1990 Grand Am models with a 2.3L engine and automatic transaxle may have one of the conditions:

Blown ECM/RLVS Fuse, no SES light, stall after start up, cranks but no start

TCC on in 2nd gear (releases with brake apply), SES light code 26, shudder in 2nd gear, scan tool shows no TCC even though it is applied. Intermittent condition may be a complaint of engine miss (caused by TCC busyness) no SES light or codes.

After driving 50 mph, SES light code 62, scan tool shows no for 2nd gear but actually in 2nd gear.

SES light code 62, no TCC apply, scan tool says no 3rd gear but actually in 3rd gear.

The cause of these conditions may be the result of a wiring harness coming into contact with the valve body cover of the transaxle. See illustration below. Four wires are grouped in this harness that connect to the transaxle TCC connector. The wire insulation may be worn through allowing any of the above conditions to occur.

To prevent this from reoccurring, repair any damaged wiring as instructed in Section 8A of the service manual, then tape the harness to the larger main conduit. This should eliminate any further contact with the transaxle cover.

Warranty Information:

Labor Operation Number: N6270 Labor Time .5 Hour

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.