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ECM, A/C Signal - Revised Electrical Diagnosis|Page 3327 > < ECM/PCM - Damage Prevention
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Engine Control Module: Technical Service Bulletins
ECM, A/C Signal - Revised Electrical Diagnosis

Number:

90-377-8A

Section:

8A

Date:

November 1990

Corporate Bulletin No.:  018120

Subject:
ELECTRICAL DIAGNOSIS

Model and Year:
1990 CORVETTE

TO:

ALL CHEVROLET DEALERS

The 1990 Corvette Service Manual incorrectly shows the ECM A/C Request Input sourced to voltage, instead of ground, in ELECTRICAL DIAGNOSIS
(SECTIONS 8A-64 and 8A- 67). Refer to the pages (listed) for the correct information.

ECM, A/C Signal - Revised Electrical Diagnosis|Page 3327 > < ECM/PCM - Damage Prevention