LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
GMC
>>
1990
>>
Forward Control 3.9 L
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Tests W/Codes - Diesel
>>
ECM Location
>>
Notes
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
ECM Location: Notes
The ECM is located under the dash, behind the glove box.