* Shift Linkage: This is the most common cause. Over time, the linkage can become worn, bent, or disconnected. This prevents the shifter from properly engaging the park position within the transmission. Check for:
* Bent or loose linkage rods: Inspect the rods connecting the shifter to the transmission. Look for any bends, loose bolts, or worn bushings.
* Broken or damaged cables: If your Blazer uses cables instead of rods (less common), check for any fraying, breakage, or improper routing.
* Adjustments: The linkage might need adjustment. Your owner's manual may describe how to adjust it, or you can find instructions online (search "1995 Chevy Blazer shift linkage adjustment").
* Park Pawl: This is a mechanism inside the transmission that locks the output shaft in place when in park. If it's worn, broken, or otherwise malfunctioning, the transmission won't lock in park even if the shifter is in the correct position. This is a more serious issue requiring transmission repair or replacement.
* Transmission Fluid: While less likely to be the direct cause of the park issue, low or dirty transmission fluid can contribute to problems within the transmission. Check the fluid level and condition. If it's low, add the correct type of fluid (check your owner's manual). If it's dirty or burnt, a transmission flush might be needed, but this shouldn't be attempted if you aren't experienced.
* Shift Cable Adjustment (if applicable): Some Blazers use shift cables. These cables can stretch over time requiring adjustment. Consult your owner's manual or a repair manual for your specific Blazer model to learn how to adjust these cables.
What to Do:
1. Safety First: Before attempting any repairs, engage the emergency brake firmly and chock the wheels. Leaving the vehicle in a position that isn't securely parked is extremely dangerous.
2. Visual Inspection: Start with a thorough visual inspection of the shift linkage. Look for anything that's obviously bent, broken, loose, or disconnected.
3. Professional Help: If you're not comfortable working on your vehicle's transmission, it's best to take it to a qualified mechanic. Attempting transmission repair without experience can lead to further damage. The park pawl issue, in particular, requires specialized tools and knowledge.
4. Repair Manual: A repair manual specific to your 1995 Chevy Blazer will provide detailed diagrams and instructions for diagnosing and repairing the shift linkage and transmission.
This problem could be minor (a loose bolt), or it could indicate more significant internal transmission problems. Don't drive the vehicle extensively until the issue is resolved, as leaving it in a gear that isn't fully engaged could cause damage.
