1999 Chevrolet K1500 - Page 7 - Answered Questions & Fixed issues

replace the security module since it is faulty

theres a good possibility that the brake light switch is bad or out of adjustment. it is located just above brake pedal, so when you apply brakes it turns on brake lights. good-day !

What was the fuel pressure?

GM vehicles are notorious for a a having a failed antitheft system thats called Passlock. When this system fails, the key doesnt communicate with the ignition correctly and causes the vehicle to stall. Next time this happens, look for a light on the dash that says SECURITY, if you see this, then this is the problem. Go to this link for info and DO IT YOURSELF solutions to this problem.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Dash lights may be replaced depending on the dash cluster. Most these days are (sealed) and require a (new) cluster. The only way to know for sure is by contacting a dealer. Removing the cluster is not an easy task, by the way. Hope this helps.

if you get to step 4 email the code to me at [email protected]


Service Information

1999 Chevrolet Chevy K Pickup - 4WD ' Escalade, Pickup Classic, Suburban, Tahoe, Yukon VIN C/K Service Manual ' Document ID: 522597 Radio Displays LOC, LOCKED, or CODE Step
Action
Value(s)
Yes
No
1

1. Turn the ignition off.
2. Disconnect the negative battery cable for 1 minute.
3. Reconnect the battery cable.
4. Turn the ignition to run.
5. Turn the radio on.

Does radio now operate?
--
--
Go to Step 2
2
Important: It will say Theftlock® on the face of the radio.
Does the Radio have Theftlock?
--
Go to Step 3
--
3
Is it possible to get the security code from the customer?
--
Go to Radio/Audio System Operation
Go to Step 4
4

1. Turn the ignition on.
2. Turn the radio off.
3. Depress and hold Pre-set buttons 2 and 3.
4. Write down the first three digits that appear on the radio display.
5. Depress AM/FM, write down the second three digits that appear on the radio display.

Did you receive the 6 digit Radio Display Code?
--
Go to Step 5
Send Radio in for repair
5
Contact Delco Assistance to obtain a "Radio Back-up Code".
--
Go to Step 6
--
6

1. Use the hours and minutes buttons on the radio and install the 4 digit "Radio Back-up Code".
2. Depress the AM/FM button.
"SEC" should display.

Did the radio unlock?
--
Go to Step 7
Repeat Step 6
7
Important: This will remove the original owner's code. The owner will then be able to reinstall their own personal security code.
Step 6 only unlocked the radio, if the original code is not known, repeat step 6.
Did the radio display?
--
--
Repeat Step 7

check your owners manual and see if you have an inside cab air filter for the heater/air cond. When they get clogged, they restrict the air flow.

First check your basics. Check the fuel filter for plugging. It is on the driver's side of the frame underneath the vehicle. The other item to check is the MAF or mass air flow sensor. If there is a check engine light on have it scanned by a local auto parts store for free and let me know what the codes are. Be happy to help further.

you could be dealing with a vacuum leak on the manifold. you can use some wd-40 or carb spray to help find it. just spray it over the hoses and if there is a leak you should here a change in the motor.

Try checking the connection at the blower motor its likely the problem

You set number one piston at Top Dead Center (TDC) and made marks on the distributor in relation to its location on the engine, or at least remember the direction in which the rotor was pointing. If you didn't, then the first thing to do is set TDC and then stab the distributor. At TDC, the rotor points to the number one spark plug wire post, follow the firing order from there. While stabbing, you may have to rotate the distributor left or right a little to get the splines to mesh.

Could be a bad ground oh headlights or power not getting to the bulb hot side.
If you have a volt meter you can measure the voltage there on the headlamp.
First measure the hot side...if 12 volts there then measure the bulb ground side. If 12 v is there then the ground connection is bad.

Hope this helps you

This would be a loss of freon in the system, provided that you know the blend door is operating. You can have a local mechanic recharge the system and add dye to find a leak. Leaks are often bad O-rings but can also be bad mating surfaces on components.

unfortunately these trannys are all electronic with no adjustment, you will have to get it rebuilt, repaired, or replaced unfortunately..

It would help to know exactly what the voltmeter was reading.
Although many US trucks have ammeters instead of voltermeters, which are not as useful.
If you are saying the ignition switch is not causing a heavy draw as one would expect from a starter, then either the ignition switch, neutral safety switch, solenoid, bad engine ground, or dirty battery terminals are reducing current flow. A voltmeter should read 12 volts from the battery when engine is off. Why you try to start, the starter should draw it down do about 10, but then when it starts and you rev it up, it should go over 13.5. If it does not drop to 10, then you have a blockage.

a leaking fuel injector will continue to flow fuel after the engine is shut off. This fuel flows down the cylinder wall, past the rings and into the oil pan. A leaking fuel pressure regulator will do the same.

http://realfixesrealfast.com/realfixesrealfast.com/Tricks_%26_shortcut_videos/Pages/Leaking_fuel_regulator.html

if your saying its a P0302, it means this Cylinder 2 Misfire Detected check here for solutions http://www.obd-codes.com/p0302

after removing intake and valve covers you should be able to get to the head bolts..if you need step by step try a chilton manual i cant type that much sorry

NOTHING IN THE TRANSFER CASE ROTATES WHEN ENGINE RUNING AND IN PARK OR STOP I WOULD THINK MORE OF TRANSMISION TORQUE CONVERTER BOLTS OR FYWHELL BOLTS OR SOME FORING OBJECT IN THAT AREA

Ok I would start by checking your shifter to make sure it adjusted right and you can do this by looking at your shift indicator if that is ok then might have a bad manual shift valve thats in the transmission, if that valve goes bad it would tell the pcm that your transmission is being shifted into another gear while your driving causing the Power control module (PCM) to out you vehicle into reduced engine mode