Need to replace the shift solenoid on my 2003 buick rendezvous and was told at the dealership that if I removed the pan and filter I would have acess to the solenoids, This is not true. were are they located and how much time will it take to replace them so that I can plan for vehicle downtime.

Marvin

• 85242 Answers
• Posted on Oct 06, 2008

SOURCE: tcc solenoid code

This is a transmission issue, TCC is Torque Converter Control, the solenoid is inside the trans, unless you are a well versed technician I would leave this to the transmission experts, you might try premium assistance for someone that can provide more detailed step by step repair procedures if you are determined to do the repair yourself.

SOURCE: 2001 Buick Century shift solenoid

It is in the side cover on the valve body. The transmission needs to be removed to access the solenoids.

SOURCE: 1999 buick lesabre won't start

Have you tried changing the starter I had to on mine and it solved the prob

SOURCE: 2004 Buick Rendezvous, speedometer fluctuations

Turns out this is a common problem for the Rendezvous.
I took it to a mechanic and after he tested to see if all the speed sensors were working with his handheld computer reader, (because there is no speedometer cable anymore) He reset the needle by turning the key about 25 times as far as possible without starting the vehicle. The speedometer needle came back a bit each key turn till it reached zero. It's been working fine since.

SOURCE: 2003 buick rendezvous has serious transmission

Here is a bulletin I located about what seems to be the issue you are describing. As far as DIY goes it really depends on how comfortable you are to disassemble parts of your transmission.

Some dealership technicians may have difficulty diagnosing DTC P0756, 2-3 Shift Valve Performance on 4L60-E, 4L65-E or 4L70-E automatic transmissions. As detailed in the Service Manual, when the PCM detects a 4-3-3-4 shift pattern, DTC P0756 will set. Some customers may also describe a condition of a second, third or fourth gear start that may have the same causes but has not set this DTC yet. Below are some tips when diagnosing this DTC:
• This is a performance code. This means that a mechanical malfunction exists. • This code is not set by electrical issues such as a damaged wiring harness or poor electrical connections. Electrical problems would cause a DTC P0758, P0787 or P0788 to set. • The most likely cause is chips/debris plugging the filtered AFL oil at orifice #29 on the top of the spacer plate (48). This is a very small hole and is easily plugged by a small amount of debris. It is important to remove the spacer plate and inspect orifice #29 and the immediate area for the presence of chips/debris. Also, the transmission case passage directly above this orifice and the valve body passage directly below should be inspected and cleaned of any chips/debris. For 2003 and newer vehicles the spacer plate should be replaced. The service replacement spacer plate is a bonded style with gaskets and solenoid filter screens bonded to the spacer plate. These screens can help to prevent plugging of orifice #29 caused by small debris or chips. • This code could be set if the 2-3 shift valve (368) were stuck or hung-up in its bore. Inspect the 2-3 shift valve (368) and the 2-3 shuttle valve (369) for free movement or damage and clean the valves, the bore and the valve body passages. • This code could be set by a 2-3 shift solenoid (367b) if it were cracked, broken or leaking. Refer to Shift Solenoid Leak Test in the appropriate Service Manual for the leak test procedure. Based on parts return findings, a damaged or leaking shift solenoid is the least likely cause of this condition. Simply replacing a shift solenoid will not correct this condition unless the solenoid has been found to be cracked, broken or leaking.