Working on a 2005 Buick LaCrosse cxs with the 3.6l. Car won’t start. Won’t turn over or anything. Hooked tech 2 to it and it says fuel security disabled. Have master key. Tried reprogramming but it doesnt work. Also tried getting into personal settings on dic. Says available when car in park. Car is in park. The transmission shift indicator on dash doesn’t light up showing what gear it’s in and half the gauges don’t work. Doesn’t show oil life remaining, miles to mt nothing. Tried resetting oil life with tech 2 and it don’t work. Checked into some of the radio and security features using the tech 2 and it starts reading then says key must be on and loses connection.

Harvey N Tawatao

• 3854 Answers
• Posted on Apr 06, 2009

SOURCE: 2004 touring won't start

Try changing your fuel filter and checking your fuel pressure. Can always try runiing injecter cleaner after new fuel filter put in. Good luck

SOURCE: 1995 Buick Lesabre: security blinks and car will not start

If the starter is turning the engine, try re-setting the security system (leave key on till light stops blinking.) If the starter does not turn, you may have some success in re-setting system, if not you need to check battery voltage and voltages in starter system till you find the problem...can be something as simple as a bad connection at the battery. If you need help with further testing, just ask.

SOURCE: 2005 buick Lacrosse fuel filter and other problems...

No a Plugged fuel filter would not cause more fuel consumption but would lead to damage to the injectors and the fuel pump, and is much cheeper than the fuel pump or injectors. And I believe you mean Flex plate broke? And I do believe you should check with the dealer this unit should have a 100,000 drive train warrenty and they should kick in on the transmisson.

Vincent G

• 2363 Answers
• Posted on Dec 01, 2009

SOURCE: I have a 2007 Cadillac CTS. I go to turn the key

Test the neutral safety switch by doing the following steps.

1)foot on brake
2)turn key to on position
3)shift lever to neutral (N)
4)start the engine
5)shift the lever to Park (P)

If the engine can start at N and not at park then it's the neutral safety switch.

SOURCE: 04 avalanche- suddenly windows, locks, radio and

Check for fuses and fusible links that may be tripped or blown.

Next, check for grounding issues someplace easy to reach like the heated seat connectors.

Most dummy lights work by choosing the warning light path over the circuit path when the circuit path is higher resistance. Which may explain your dash warning lights.

So, what I am trying to say is...you are looking for a open ground in a big big place....like under the hood at one of the major fuse/relay/fusible link points.

Check it out. Good luck and be careful.