1. Check the Liftgate Release Cable:
* Manual Release: Many 97 Grand Cherokees have a manual interior release lever. It's usually located near the rear of the cargo area, sometimes hidden under a panel or trim piece. Try locating and firmly pulling this lever. If there's resistance, the cable might be broken or stuck.
* Cable Check (Requires some disassembly): If the manual lever doesn't work, you'll need to access the liftgate mechanism. This usually involves removing interior trim panels in the cargo area to expose the cable running from the release handle to the latch. Inspect the cable for breakage, fraying, or kinks. You might need to lubricate the cable mechanism if it's stiff.
2. Check the Liftgate Latch:
* Frozen or Stuck: Cold weather can freeze the latch mechanism. Try spraying some penetrating lubricant (like WD-40 or silicone spray) around the latch area and the latch itself. Let it sit for a few minutes to work before trying again.
* Debris: Check for debris, leaves, or ice blocking the latch mechanism. Clean any obstructions.
* Worn or Damaged Latch: The latch itself could be worn out or broken, preventing it from releasing. This would require replacement.
3. Check the Liftgate Lock Actuator (If Electric):
* If equipped with power locks: There might be an issue with the electric liftgate lock actuator. This is less likely on a '97 model but it's possible. A failing actuator might not fully release the latch, even though the lock is unlocked. You would likely need a replacement actuator if this is the problem.
4. Check the Liftgate Struts:
* Broken Struts: While this wouldn't prevent unlocking, weak or broken liftgate struts can make the liftgate difficult or impossible to open manually, even if the latch is released. If it's extremely difficult to lift, you need to replace the struts.
Safety Precautions:
* Never attempt to force the liftgate open. This could cause damage to the mechanism or even injury.
* If you're uncomfortable working on the vehicle yourself, take it to a qualified mechanic.
Troubleshooting Steps:
1. Start with the simplest: Try the manual release lever first.
2. Lubricate: Use penetrating lubricant.
3. Inspect: Check for broken cables, stuck mechanisms, and debris.
4. Consider replacement parts: If you find broken or worn parts, you'll need to replace them.
Remember to consult a repair manual specific to your 1997 Jeep Grand Cherokee Laredo for detailed diagrams and instructions if you plan to perform repairs yourself. This will help you identify the specific location of parts and the proper procedure.