Left gym. Pulled out of parking spot and truck would not get out of 1st gear

thought i hit button on gear shift putting it into manual. Hit buttons on gear shift. Nothing changed.

Limped towards home for 15 minutes then suddenly the door locks locked without me touching them and all the sudden the transmission was going from first gear to 2nd to 3rd to 4th like there were no problems at all

I drove home successfully. This morning hoping the problem was solved, I headed to work but couldn’t get out of 1st gear. Then about 10 minutes later same thing the door locks locked, and suddenly it was driving as if there were no problems.

The wrench showed up on the dashboard shortly thereafter, putting me back in the limp mode and I drove over at 20 miles an hour in first gear to the mechanic shop. It seems to be there is some electrical issue.

The truck is 13 years old with 210,000 miles any thoughts on what could be causing the problem and what I may need to do?

it Is very coincidental that each time suddenly power was sent to the door locks which I did not touch and suddenly my transmission was shifting gears appropriately.


mechanic offered up these solutions:

Lead Frame/Transmission Filter TSB Tech: P A
Labor

Total Lead Frame/Transmission Filter

$815.96 Part Qty
Total OEM Lead Frame
1
$630.73 OEM Filter
1
$118.75 OEM Gasket
1
$111.11 APPROVE
or
DECLINE
Subtotal$1,676.55
Est. Tax$71.00
Job Total$1,747.55
Note:
The vehicle is experiencing gear engagement issues and was found to be stuck in limp mode, which has triggered two diagnostic trouble codes related to the same concern. A Technical Service Bulletin (TSB AL-3Z-7G-276-A) indicates that the lead frame within the transmission requires replacement, along with a transmission flush and new filter installation.




BG Transmission Fluid ServiceTech: P A
Labor

Total Transmission Flush

$179.99 Part Qty
Total OEM Transmission Service Kit
1
$19.95 OEM Mercon LV - 5 Quarts Automatic Transmission Fluid
3
$295.77 APPROVE
or
DECLINE
Subtotal$495.71
Est. Tax$26.05
Job Total$521.76
Note:
The vehicle is experiencing gear engagement issues and was found to be stuck in limp mode, which has triggered two diagnostic trouble codes related to the same concern. A Technical Service Bulletin (TSB AL-3Z-7G-276-A) indicates that the lead frame within the transmission requires replacement, along with a transmission flush and new filter installation.
Fuse Relocation TSB Tech: P A
Labor

Total Fuse Relocation

$169.99 Part Qty
Total OEM Fuel Pump Jumper Harness Kit
1
$93.30 APPROVE
or
DECLINE
Subtotal$263.29
Est. Tax$7.70
Job Total$270.99
Note:
During the inspection, I observed that fuse #27 shows signs of discoloration and partial melting, which could lead to intermittent stalling and erratic fuel codes. If this issue is not addressed, it may result in the vehicle not restarting until the fuse cools down, highlighting the importance of considering a fuse relocation kit for a more reliable solution.