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68gmsee · 08-20-2013, 01:57 PM

One more final test if all the above fail to resolve.

Remove the gauge cluster and check all the lands and connections to insure they're not broken or loose.

Remove the front cover being careful not to lose the cardboard light covers.

Check the needle on the fuel gauge. It should have a slight resistance when you try to lightly move it. Tap or shake it to see if it bounces. If it moves freely, the needle itself may be lose or the gauge asm will need to be replaced. They're about $30 at LMC not sure about other vendors.

I checked two fuel gauge ceramic resistors between the mounting posts. After I removed them one measured app 77.8 ohms the other one measured 85 ohms.

08-20-2013, 01:57 PM	#8
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Gas gauge bouncing One more final test if all the above fail to resolve. Remove the gauge cluster and check all the lands and connections to insure they're not broken or loose. Remove the front cover being careful not to lose the cardboard light covers. Check the needle on the fuel gauge. It should have a slight resistance when you try to lightly move it. Tap or shake it to see if it bounces. If it moves freely, the needle itself may be lose or the gauge asm will need to be replaced. They're about $30 at LMC not sure about other vendors. I checked two fuel gauge ceramic resistors between the mounting posts. After I removed them one measured app 77.8 ohms the other one measured 85 ohms. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...