Question about 1996 Buick Skylark
Check this on 3.1L and 3.3L Engines
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Posted on Jan 02, 2017
SOURCE: 1995 Buick skylark overheating
there could be several resons for the overheating:
1. water pump doesn't circulate properly
2. Bad thermostst
3. fan clutch/radiator fan are non operative
4. relay is bad
5. clogged system
6. clogged radiator
to check on the the specific problem first power wash the radiator to remove bugs and road grime. they block the air from flowing over the fins and coil of the radiator thus not allowing the heat to disapate from the coolant. next install the good thermostat and make sure the spring part of the thermostat is facing down.next fill the radiator with coolant all the way up to the neck of the radiator and leave the cap off. next turn your heat setting to max fan and max heat temp. start the vehicle let the vehicle heat up and keep watch for the the flow of coolant soon as it goes down you should feel the upper radiator hose get real hot this indicates that the thermostat is working. now if you have a fan clutch for a conventional rear drive vehicle once the temp reaches 180 degrees the fan should no longer free spin it should start spinning faster if it is working like it should. if you have a transverse mounted engine for front wheel drive you will have a fan unit mounted to the radiator. these should be spinning when the engine reaches temp of 180 degrees. If they are not open the junction box and located the fan relay. switch out the relay with another one( I use the a/c clutch relay)if the fans kick on it's the relay that is bad, if it doesn't then either it's the fan unit itself or the temp sensor on the fan unit.now after you have done all these checks and everything is in order check the hoses going to the heater core at the fire wall they should be hot to the touch if they are not you have a clog at the by-pass of the water pump or manifold inlet.if the hoses are hot and you still have no heat then it's a bad valve inside the cab near the heatercore or a defective climate control module. check the fuse first to see that it is good.after the engine has been running a while the level of coolant should have gone down and then refill to proper level and replace cap after all of this if you still don't have heat and it overheats you have a bad water pump.... please rate this thanks
Posted on Sep 23, 2008
make sure there is coolant in the motor and hopefully no air. best way to find the tstat is to trace where the upper radiator hose comes off radiator and goes to
Posted on Jun 26, 2008
water pump is located at the very back of your car engine almost touching the firewall.
its a pain to get back there and just pray your water pump dont actually go out cause its best to take to a mechanic its all inter twined with the timing chain and alot of removal just to take out and replace..best of luck
Posted on Nov 25, 2008
Need a bit more information, Is the security light on, have you checked for spark and fuel pressure, just in case you did and know it is the passlock system then check this out, hopefully it will ansewer your problem, please rate your mechanics help.
have a great day. Sorry the pictures won't come up, but check out the site
GM Passlock I & II Information
Please study the following information carefully WHEN INSTALLING REMOTE START systems on a 1996 or later GM car or truck.
Introduced in 1996, GM has changed the VATS anti theft system to Pass-Lock system. This is a similar device to the VATS system, in that there is a resistor present during the start cycle. However, in the PASSLOCK system, the resistor has been placed inside the ignition switch, instead of the key. See the GM V.A.T.S page for more information.
To remotely start a car with this feature, you must bypass the PASSLOCK system. There are two methods of doing so.. The first, is to permanently bypass this system. This is the easiest method for accomplishing your task. The second way, is to temporarily bypass the PASSLOCK, by introducing relays into the system, which retain all of the features of the system, while allowing your remotes start module to bypass it automatically during a remote start cycle.
(1996 and newer): N & J body cars, such as
Pontiac Sunfire and GrandAm Passlock-1
Chevrolet Cavalier Passlock-1
Buick Skylark Passlock-1
Oldsmobile Achieva Passlock-1
1997 or newer
Chevrolet Malibu Passlock-II
Oldsmobile Cutlass Passlock-II
1998 or newer
All trucks , SUVs and Vans Passlock-II
It is important to pay special attention to the fact that there are many different ways of achieving the same goal. There are actually 2 different Passlock-II systems. On the next page, there are tests to establish which type of passlock-II your car has.
Relays shown are standard automotive 5 pin spdt relays, available from IEI.
A multi meter is required to measure the resistance values. Accuracy is important within 5%.
Once the value of the resistor is measured, a resistor of the same value +/-5% must be purchased (Radio Shack, for example). You can also use a Potentiometer (POT), which can be adjusted to the same value of the resistor in the ignition switch.
Passlock-I bypass procedure....
1: Remove the top and bottom shrouds from the steering column.
2: Find the 3 wire ribbon cable, coming from the ignition switch, containing White, Black, Yellow (Sometimes White, Black, Black). These are THIN wires.
3: Locate the Black 6 position connector on the LEFT side of the steering column, right above the ignition switch position. There is a BLACK (Thin) wire in this connector, called "Bulb Test", which shows Ground with ignition in the Off position, OPEN in the "Run" position, and GROUND in the "Crank" position.
4: Turn the ignition switch to the "Run" position. Do not crank the car.
5: Cut the Thin Yellow wire and strip both ends.
6: Without cutting the Black wire, expose some of the copper.
7: Using the ohmmeter, measure from the Yellow wire (the end coming from the ignition switch), to the exposed Black wire and record the value. Measure more than once to assure you have the right value.
8: Acquire the same size resistor and 3 relays, and perform the connections shown in the diagram below.
PASSLOCK-II bypass procedure
There are 2 types of Passlock-II systems. To determine which system you have, follow these instructions;
1: Locate two wires, which are THIN and are in the main ignition harness.. Orange/Black (or Black) and Yellow.
2: Cut the Yellow wire, and strip back some of the insulation from the Orange/Black (Or Black) wires.
3: Turn the ignition to the "Run" position ( don't crank the starter). Measure and record the value measured from the KEY SIDE of the Yellow wire, to the Black/Orange wire.
4: Turn the key to the "Crank" position and release. Now read the value again.
5: If the value changed, follow "Method#1". If the value stayed the same, follow "Method#2".
These diagrams are from our friends at ALARMTEK AUTO ALARM
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Posted on Oct 22, 2009
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