Just bought a used 2002 chevy s10 crew cab and drove it will trailer in tow this weekend. when I got to my desination over several mountians, the check engine/guages light came on. The oil pressure was at 40 when I started. It sat all day long and then I loaded up and went back home and it stayed at 20 the way home. when I stopped the vehicle the check guages came on again, the oil guage was at zero when standing still. Not sure what it is or what it should be?

THE FUEL TANK IS WHERE THE FUEL CAP IS.

Autozome.com:

Hello, The hitch extension is available I believe at Tractor Supply. It goes into the receiver just like the normal size receiver parts do and can be changed like current hitches. What you want is a drop hitch with an extension, or an extension that allows any type of hitch to be added to the end.

There are some hitches that have an adjustable drop end, but you will need to do some looking on the Web to find a 1 piece extension with an adjustable drop. You may have to buy a separate extension and plug in a drop hitch.

When you have a height problem between the towing vehicle and the load, sometimes you can change wheels or tire profiles on the trailer or camper to level the load.

Check out Draw-tite, Tractor Supply, and possibly Ranch-Hand products. There may be Hitch parts on sites for Construction trailer equipment.

Check the fuse for the trailer tow parking lamps, this is engine compartment fuse # 5, 20A
The other thing to check is the trailer tow parking lamp relay.

your best bet is to get a harness from the parts store for your truck. cost is around $30.00 but well worth it. it connects into your harness and doesnt corrode and blow fuses while your trailer is in the water

Are they led lights? if so use a test light across both terminals of the connector on the back of the light. led assembles can go bad.

As listed in the owners manual.

Weight of the Trailer
How heavy can a trailer safely be?
It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to
pull a trailer are all important. It can also depend
on any special equipment that you have on
your vehicle, and the amount of tongue weight the
vehicle can carry. See “Weight of the Trailer
Tongue” later in this section for more information.
Maximum trailer weight is calculated assuming
only the driver is in the tow vehicle and it has all
the required trailering equipment. The weight
of additional optional equipment, passengers and
cargo in the tow vehicle must be subtracted
from the maximum trailer weight.
The following charts show how much your trailer
can weigh, based upon your vehicle model
and options.
2WD Extended Cab Axle Ratio Maximum Trailer Weight GCWR*
Automatic Transmission,
2.9 L Engine 3.73 3,100 lbs (1 406 kg) 7,000 lbs (3 175 kg)
Manual Transmission,
2.9L Engine 3.73 2,100 lbs (952 kg) 6,000 lbs (2 721 kg)
4WD Crew Cab Axle Ratio Maximum Trailer Weight GCWR*
Automatic Transmission,
3.7L Engine 3.73 4,000 lbs (1 814 kg) 9,000 lbs (4 082 kg)
*The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded
vehicle and trailer including any passengers, cargo, equipment and conversions. The GCWR for your
vehicle should not be exceeded.

check all trailer tow fuses in panel under hood.there is a fuse for trailer brake lights and a fuse for trailer signals.but if one signal is working it is probaly broken or corroded wires at the back of the trailer plug or corroded wires inside plug.

if it is common rail injection sounds like an injector failiure. If you can tow it in gear and it starts, it's overfuelling.