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.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 829 (BATTERY)REPAIR INSTRUCTIONSBATTERY POSITIVE CABLE REPLACEMENTREMOVAL PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
Unsnap the positive battery cable cap.
Disconnect the positive battery cable.

Fig 1: Disconnecting Positive Battery Cable
Courtesy of GENERAL MOTORS CORP.

Important: The bolt is integral to the battery cable and is not removable.
Loosen the positive battery cable bolt at the underhood bussed electrical center (UBEC).

Fig 2: Loosening Positive Battery Cable Bolt
Courtesy of GENERAL MOTORS CORP.
If necessary, remove the engine sight shield. Refer to ENGINE SIGHT SHIELD REPLACEMENT (4.8L, 5.3L, AND 6.0L (RPO LQ4) or ENGINE SIGHT SHIELD REPLACEMENT (6.0L (RPO LQ9) in Engine Mechanical - 8.1 L.
Unsnap the junction block cover.
Remove the positive battery cable (1) from the junction block.

Fig 3: Removing Positive Battery Cable From Junction Block
Courtesy of GENERAL MOTORS CORP.
If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the negative cable clip from the positive cable clip.
Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.

Fig 4: Removing Negative Cable Clip From Positive Cable Clip
Courtesy of GENERAL MOTORS CORP.
If equipped with a 8.1 L engine, remove the negative cable clip from the positive cable clip.
Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.

Fig 5: Removing Negative Cable Bolt
Courtesy of GENERAL MOTORS CORP.
Remove the positive battery cable channel bolt.
Slide the channel pin out of the oil pan tab.
Remove the positive battery cable from the channel.

Fig 6: Removing Positive Battery Cable Channel Bolt
Courtesy of GENERAL MOTORS CORP.
If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the battery cable bracket bolt and bracket from the power steering pump.

Fig 7: Removing Battery Cable Bracket Bolt And Bracket From Power Steering Pump
Courtesy of GENERAL MOTORS CORP.
If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the positive cable nut (1).
Remove the positive cable from the starter.
Remove the positive cable clip from the clip on the oil pan.
Remove the positive cable from the clip on the oil pan.
Remove the positive battery cable.

Fig 8: Removing Positive Cable From Starter
Courtesy of GENERAL MOTORS CORP.
If equipped with a 8.1 L engine, remove the positive cable nut (2).
Remove the positive cable (1) from the starter.
Remove the positive cable clip bolt (3).
Remove the positive cable from the engine harness clip.
Remove the positive battery cable.

Fig 9: Removing Positive Cable Clip Bolt
Courtesy of GENERAL MOTORS CORP.