20 Most Recent 2003 Buick LeSabre Questions & Answers


The battery is under the back seat .

2003 Buick... | Answered on Jan 26, 2019


I have a 2003 Buick lesabre limited my inside lights don't work

2003 Buick... | Answered on Dec 08, 2018


On this website you find ruse box diagram and description for Buick LeSabre (2003)

Buick LeSabre 2003 2004 fuse box diagram CARKNOWLEDGE

2003 Buick... | Answered on Oct 25, 2018


On this website you find ruse box diagram and description for Buick LeSabre (2003) Buick LeSabre 2003 2004 fuse box diagram CARKNOWLEDGE

2003 Buick... | Answered on Oct 25, 2018


The proper thing to do would be to hook up a factory or professional type scanner an check input data to the PCM from the Transmission internal mode switch . Error means the instrument cluster is loosing data from the PCM - engine computer .

The lever assembly-manual shaft detent with internal mode switch (IMS) is a sliding contact electrical switch assembly that corresponds to the PRNDL position selected. Each of the PRNDL positions has a unique ground pattern on four wires from the PCM.
The assembly consists of two major components:
• The internal mode switch that consists of:
- The housing (1), which makes up the stationary contacts.
- The insulator (2), which makes up the moving contacts and is secured on the detent lever (4).
• The lever assembly which consists of:
- The manual shaft (3)
- The detent lever (4)
The range detection is accomplished by securing the moving contacts to the detent lever. When the driver selects a PRNDL position, the detent lever inside the transmission rotates. This rotates the insulator which in turn grounds the four wires in a unique pattern for each gear selection, corresponding to the PRNDL position selected. The IMS is electrically connected by five wires (four of which the PCM supplies voltage to and one wire that is a common ground) to the transmission pass through connector.


Range Selector Displays Incorrect Range
The transmission internal mode switch (IMS) is a sliding contact switch attached to the selector detent inside the transmission side cover. The four inputs to the PCM indicate the position of the transmission range selector. The input voltage level at the PCM is high, B+, when the IMS is open and low when the switch is closed to ground. The four input parameters represented are Signals A, B, C and P, Parity. Refer to Transmission Internal Mode Switch Logic .
Install a scan tool.
Turn ON the ignition, with the engine OFF.
Select IMS on the scan tool.
Place the range selector in each transmission range: P, R, N, D4, D3, D2 and D1.
Does each range selected match the scan tool IMS display?
--
Go to Intermittent Conditions in Engine Controls - 3.4L
Go to Step 2
2
Select IMS A/B/C/P on the scan tool.
Place the range selector in each transmission range: P, R, N, D4, D3, D2 and D1.
Does the IMS A/B/C/P display the specified values for each range?

Your best bet , take your vehicle to a qualified repair shop.

2003 Buick... | Answered on Jan 30, 2018


you have a blown heat gasket possibly and we can offer nothing but GO SEE a GOOD MECHANIC or a dealer

2003 Buick... | Answered on Jan 30, 2018


The root cause can be a failed radiator fan relay, bad water pump or a blown head gasket. But the fact that you can't get the cap back on is troubling. Call a tow truck. Trying to drive this when it's overheating can destroy the engine. A tow is always cheaper than a new engine

2003 Buick... | Answered on Dec 05, 2017


if you have a code reader available,reset trouble codes,if that doesn't work you probably need to have it checked out.they may have dis lodged a sensor when they changed the tires.unless you radically changed tire size it shouldn't be the tires

2003 Buick... | Answered on Nov 18, 2017


Here's the link and I'm sure you will get the solution of your problem
2003 Buick

2003 Buick... | Answered on Oct 14, 2017


Have the problem system checked for proper ground. It may be at the fuse box if it got wet. Electricity and water mean corrosion when there are two metals present - usually copper and iron. When electrical boxes or connections get 'warm' it means that there is added resistance in the circuit causing the heat. (like a light bulb without the light)

2003 Buick... | Answered on Sep 29, 2017


How is fuel gauge?going up and down?

2003 Buick... | Answered on Aug 15, 2017


I would take it back. If camshaft is damaged, it will be expensive fix. Lifters going bad at 88k indicates neglect.

2003 Buick... | Answered on Jul 16, 2017


Sounds like a wiring problem. Try writing to GM directly: https://www.gm.com/site-help/contact-us/email-us.html

2003 Buick... | Answered on Jun 09, 2017


I'll tell it's not the blower motor , it's the blower motor control processor . It's mounted to the blower motor case or heater box .
Search from over 10 Million Auto Parts

2003 Buick... | Answered on May 04, 2017


Usually the wiper module is combined with the wiper motor. If your wiper motor has more than 3 wires going to it it is incorporated into the wiper motor it self

2003 Buick... | Answered on Feb 07, 2017


Have it checked for DTC'S - diagnostic trouble codes ! Would not restart ? When you turned the key to the start position does anything happen ?

2003 Buick... | Answered on Jan 11, 2017


Very Very Very common in Buicks of many years and Models. Aside from pulling down the fuel tank and replacing the sending unit. We just go by the mileage and go from there. Its a major issue with no recall on it.

2003 Buick... | Answered on Dec 25, 2016


It's on the radiators tank it will look like either a screw in tee plastic or metal or a plastic nut at the bottom of the tank with a possible drain tube underneath it

2003 Buick... | Answered on Nov 21, 2016

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