20 Most Recent 2005 Buick LeSabre Questions & Answers


Your cooling fans are computer controlled . Has three relay's , coolant temp sensor is an input to the PCM - engine computer . Training Video on youtube on GM duel fan control . How to test etc...

2005 Buick... | Answered on Jan 13, 2018


Is the check engine light on ? Do you own a scan tool ? not a code reader . Bad fuel or dirty fuel injector's .
069 Emission Tests Misfire Scan Data

2005 Buick... | Answered on Jan 12, 2018


These are actually the bulbs that have went bad. It would be quite expensive. I have a 2004 that has done the same thing. No lights behind any buttons any more except the ac heater controls I replaced last year.

2005 Buick... | Answered on Oct 25, 2017


Disconnecting the battery will not clear the code . Have erase with a scan tool .

2005 Buick... | Answered on Jul 18, 2017


your owners manual will identify the fuse to check. If you don't have the manual, you can get one online at gm. If the fuse is good, check the blower connection for water/corrosion. If connector looks good, check it for voltage from the switch. If voltage is getting to the motor, replace the motor.

2005 Buick... | Answered on May 18, 2017


Look at the AC compressors lines in the photo, the charging port is in the larger of the two lines, just follow it, it may be under the air cleaner box like the Century
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2005 Buick... | Answered on Jun 24, 2016


This is very complex if your not familiar with how Class 2 serial data communications work . When you press that trunk lid release button it sends a low voltage signal to the BCM - body control module. Here is how the factory service info. says how it works .
When the vehicle is in park and the trunk release switch is pressed it grounds the rear compartment lid release switch input in the Body Control Module (BCM). The BCM then sends a Class 2 message to the Remote Function Actuator (RFA). The RFA supplies an internal ground for the coil side of the rear compartment lid release relay activating the relay. The rear compartment lid release actuator receives battery voltage through the 15 A trunk release fuse when the relay closes. Ground is supplied by G400.
Your best bet is to take your vehicle to a dealer or some other qualified repair shop that has a factory scan tool or a professional grade type .
You could check the TRK/REL relay in the rear fuse/ relay box .Because you can't test the class 2 data to the rear integrated module. Fuse Block Rear
Under the left side of the rear passenger compartment seat

2005 Buick... | Answered on Jun 07, 2016


If you have no other problems, It is most likely the electric motor on the IP board. Some cases it is the data chip on the board. I have replaced many of these motors over the years.

2005 Buick... | Answered on May 20, 2016


sounds like you have a temp door motor problem on the drivers side. the motors seize/stick and have to be replaced.

2005 Buick... | Answered on Apr 05, 2016


rock auto shows from $50-$100 after exchange, probably a good used one would be $25 at a wrecking yard.

2005 Buick... | Answered on Feb 17, 2016


on an 05 the speedo gets its signal from a sensor in the back of the transmission , this same sensor info is used to decide what gear to put trans in , id get under and look real good at it to see if its got any evidence of damage (scrapes or snags) to it , or even shotguning it an replacing it wouldn't be a bad idea

2005 Buick... | Answered on Jan 30, 2016


wi fi, hot spot with a provider

2005 Buick... | Answered on Dec 03, 2015

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