While parked a tree branch fell on the truck now it won't start it ran fine before the tree branch fell

Plug in the lights to make sure all the bulbs are working. Starting at the top of the tree, intertwine the lights on top of and under branches. Work your way down and around the tree, hanging lights in the back as well. When you reach the bottom, hide any extra lights behind the tree

Look for pulled out wire or broken lightbulb

I would even want to guess what damage was done.

Pine trees seal themselves with sap fairly quick so you don't have to worry. If the needles are turning yellow and dropping it could be experiencing some shock or it may just be dropping needles for the fall.
If the needles are actually turning brown, check the trunk and branches for signs of boring insect damage such as hole with sap coming out.

• Hi Elaine:
• I've found that holly likes shade and does not like drought. Try giving it a really deep watering once a week.
• How big and established is the tree?
• Did the problem just start, and what changed for the tree's environment?

the no power is a mode called "LIMP" this the ECM sets if there is a major fault in one or many of the engines sensors, to find what one your gonna have to visit one with a "code reader" this includes the "dealer" or a national auto parts chain store some of those even read the code for free just for the chance to sell you the sensor , this reminds me of one i had a year or so ago a guy that work with me parked his pick up under a tree and the next day it would start but ran terrible , turns out a animal that lived in the tree ate the wires under the hood overnite

Door panel open drivers door and look on the dash to the left and pull it open

It sounds like it is working backwards. Around the time your truck was made the industry had different emissions standards for trucks and cars. There were less controls on trucks.

There were vacuum controls that would increase idle speed when the engine was cold. The way this was done is through a water temperature sensor that is commonly called a vacuum tree. It is called a tree because it is shaped like a tree trunk with a few branches and each branch has a vacuum hose. As water temperature increases the vacuum routing changes. The cold setting makes an idle step-up dash-pot raise RPM and close the choke plate. As the water warms, the internal parts of the vacuum tree move and change the vacuum ports.

When the ports change, RPM drops and the choke plate opens and low idle speeds are restored. With the choke plate open high speed operation of the motor is assured without bogging down.

I would say most of what can be wrong is cheap to fix. A new thermostat, perhaps a new vacuum tree. Your problem can also be the vacuum lines are not connected to the correct ports. One thing many people do is to adjust the idle speed at the wrong time. The step-up cams are not in the proper position and when stuff starts working everything is out of adjustment because the changes were made at the wrong time.

This is a job for an old school mechanic.

If the abs and brake lights stay on check the abs sensor on the wheel, or side that you hit the branch on odds are that the plug in to the sensor came unplugged, or tore out a wire.

Look for a broken vacuum line. It can be anywhere under the hood, there's even one to some computers. Vacuum usually starts at one large connection and branches off.