My 1994 gmc sonoma transmission is stuck in forward (even in park).I got truck this way supposedly started this when body lift was added..no metal in trans and filter changed..any ideas

Edited the question for clarity and the correct name of the model!

It is worth a try. Back of the engine to the transmission should be the same. Others have done engine swaps in the link.

https://www.google.com/search?q=will+a+engine+from+a+94+sonoma+rwd+swap+with+a+94+sonoma+4wd

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I tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my ford explorer. it wont move forward or
reverse, engine is good both solenoids for forward and reverse work.
I don't have much technical knowledge but I just followed it step-wise, and works perfect! got it from www.reliable-store.com

GMC Sonoma 2WD Certified Reman Transmissions

www.certifiedtransmission.com/gmc/sonoma-2wd/
Certified Transmission welcomes you to our page with information about the transmissions our specialists remanufacture for the GMC Sonoma 2WD. Certified

1. Position the steering column transmission shift lever to PARK (P).
2. Apply the parking brake.
3. Raise the vehicle. Refer to Vehicle Lifting.

1. Position the transmission range select lever to PARK (P). Rotate the range select lever clockwise until it reaches the full mechanical stop position.

1. Slide the black retaining clip forward on the range select lever cable end. This will allow the white lock button to be pushed out.

1. Push the white lock button on the range select lever cable end out. This will free the metal core adjust body which is inside the cable end. Do not push the white lock button completely out.
2. Inspect the metal core adjust body on the cable end for dirt or debris that may restrict the travel. Remove any debris by washing the cable end, the metal core adjust body, and the white lock button with soap and water. If the travel of the metal core adjust body remains restricted after the cleaning, replace the cable assembly.
3. Lower the vehicle.
4. Ensure that the parking brake is applied.
5. Turn ON the ignition switch.

1. Move the transmission shift lever from PARK (P) to 1 and back to PARK (P) ten times.

1. Place the steering column transmission shift lever in the Park (P) position.
2. Turn the ignition switch to the OFF position.
3. Raise the vehicle. Refer to Vehicle Lifting.

1. Position the transmission range select lever to PARK (P). Rotate the range select lever clockwise until it reaches the mechanical stop position.

1. Push in the white lock button in order to secure the core adjuster body inside the range select lever cable end.

1. Slide the black retainer clip rearward over the cable end until it covers the white lock button. Lock the clip over the cable end.
2. Lower the vehicle.
3. Turn ON the ignition switch.
4. Ensure that all the transmission shift light positions (P. R. N. D, 3, 2, 1) engaged and illuminate. If you cannot perform this task, repeat the cable adjustment procedures.
5. Ensure that the engine starts in PARK (P) and in NEUTRAL (N) positions only. If the engine does not start in PARK (P) and in NEUTRAL (N), the Park/Neutral Position Switch may need adjustment.
6. Turn the ignition switch to LOCK.
7. Ensure that the ignition key can only be removed with the transmission shift lever in the PARK (P) position.
8. Start the engine and check the vehicle transmission shifting. The range select lever cable is properly adjusted if the steering column shift light positions are the same as the transmission engagements.

seems you,ve replaced just about everything,but i did,nt hear any mention of the coil?

The brake lamp switch is located on the brake pedal assembly under the dash. (See Diagram)

To move the vehicle, try this:

1. Turn the key to OFF.
2. Apply and hold the brake until the end of Step 4.
3. Shift the transmission to NEUTRAL (N).
4. Start the vehicle and then shift to the drive gear
you want

jack the truck up and spin the wheels one at a time... forward then back... to see if it is in the rear diff.

i have replaced 4 or 5 and have never had to do it but long extensions and a swivel helped me

sounds like a bad map sencor