Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1993 Cadillac Eldorado V8-300 4.9LFACTORY OEM SERVICE PROCEDURE
PCM and BCM - Precaution On Servicing
NO.: 93-I-5
DATE: Oct. 1992
GROUP: 6E
CORP.NO.: 216106
SUBJECT:
INFORMATION ON SERVICING PCM'S AND BCM'S ON ALL 1993 VEHICLES
In a continuing effort to improve the quality of our products, new PCM's and BCM's are being built with mylar strips inserted in each connector. This mylar strip reduces the potential for bending connector pins when the PCM or BCM is connected to the wiring harness. As the harness is connected to the PCM or BCM, this mylar strip is pushed to the back of the connector. The service units you receive may have the mylar strips pushed back or at the front edge of the connector.
Here are two special guidelines to observe when you notice these mylar strips:
^ Do not attempt to pull out the mylar strips to the front edge of the connector. Due care when servicing these units will prevent bent pins.
^ Do not attempt to remove the mylar strips even if they are damaged. There is enough clearance at the back of the connector for one mylar strip.
DATE: Oct. 1992
GROUP: 6E
CORP.NO.: 216106
SUBJECT:
INFORMATION ON SERVICING PCM'S AND BCM'S ON ALL 1993 VEHICLES
In a continuing effort to improve the quality of our products, new PCM's and BCM's are being built with mylar strips inserted in each connector. This mylar strip reduces the potential for bending connector pins when the PCM or BCM is connected to the wiring harness. As the harness is connected to the PCM or BCM, this mylar strip is pushed to the back of the connector. The service units you receive may have the mylar strips pushed back or at the front edge of the connector.
Here are two special guidelines to observe when you notice these mylar strips:
^ Do not attempt to pull out the mylar strips to the front edge of the connector. Due care when servicing these units will prevent bent pins.
^ Do not attempt to remove the mylar strips even if they are damaged. There is enough clearance at the back of the connector for one mylar strip.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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