Nov 242017

2010 Pontiac G6

I put a new (used) motor in my 2010 Pontiac G6. And when you turn the car on the backup lights come on and stay on.All the lights on the dash work. But when you go to start it nothing happens. It won’t click it, won’t do anything. I figured it’s something to do with the security system but the security light goes off as soon as you turn the key on so I’m stuck.


We have developed a Flow Chart for diagnosing no start situations. Take a look. I will ad a wiring diagram of the starting system to help assist with this issue. Check your battery connections, then your starter fuse #26.

Starting Circuit Wiring Diagram – 2010 Pontiac G6

(best viewed in Google Chrome or Firefox)
2010-pontiac-g6-starting-circuit

Nov 062017

1986 Pontiac 6000

Heater fan only works on low or cold but not high. It is a 1986 Pontiac 6000 SE.


Heater fan only works on low

This is a classic description of a failed blower motor resistor. Replacing the blower motor resistor will solve the problem.

Labor time to replace the blower motor resistor is 0.3 hours. So it doesn’t take long at all to fix it yourself. So look at the top of the firewall on the passenger side. You’ll see the electrical connector there. Unplug the connector and remove the two screws. Pull upward on the resistor and replace in reverse order.

Blower motor resistor replacement

  • Disconnect the negative battery cable.
  • Unplug the electrical connector at the resistor.

blower motor resistor electrical connector

  • Remove the resistor attaching screws(2).

blower motor resistor 1986 Pontiac 6000

  • Remove the resistor from the evaporator case.

Oct 242017

Pontiac Torrent

Loud whining sound

Loud whining sound seems to coming from the back of my car. Start hearing it at about 30mph up to about 60mph. It may be at higher speeds too, not sure if it’s road noise covering it or that it’s not as loud. Best description is like when Honda civics are retrofitted with a muffler that makes a really annoying high pitch sound. Only mine is heard in the car. Not sure if it’s heard outside car. Thank you


Oct 212017

2003 Pontiac Grand Prix

Water doesn’t appear to be running through hoses from heater core to radiator.


If the coolant system is low or has been recently worked on there may be an air pocket in the system. The cooling system requires a special bleeding procedure to remove all air from the system. If the system is full and bled properly then the water pump may be faulty if the heater core is not clogged.

Checking to see if the heater core is clogged would require disconnecting the hoses. Using a water hose fixed to one side and see if water flows out the other side.

There is one bleed valve on the 3800 engine. It is located on the thermostat housing.

Bleed valve coolant 2003 Pontiac Grand Prix

Cooling Cycle

Coolant flows from the radiator outlet and into the water pump inlet. Some coolant flows from the water pump, to the heater core, then back to the water pump. This provides the passenger compartment with heat and defrost capability as the coolant warms up.

Coolant also flows from the water pump outlet and into the engine block. In the engine block, the coolant circulates through the water jackets surrounding the cylinders where it absorbs heat.

The coolant then flows through the cylinder head gasket openings and into the cylinder heads. In the cylinder heads, the coolant flows through the water jackets surrounding the combustion chambers and valve seats, where it absorbs additional heat.

Coolant is also directed to the throttle body. There it circulates through passages in the casting. During initial start up, the coolant assists in warming the throttle body.

From the cylinder heads, the coolant flows to the thermostat. The flow of coolant will either be stopped at the thermostat until the engine reaches normal operating temperature, or it will flow through the thermostat and into the radiator where it is cooled. At this point, the coolant flow cycle is completed.

Efficient operation of the cooling system requires proper functioning of all cooling system components. The cooling system consists of the following components.

Water Pump

The water pump is a centrifugal vane impeller type pump. The pump consists of a housing with coolant inlet and outlet passages and an impeller. The impeller is mounted on the pump shaft and consists of a series of flat or curved blades or vanes on a flat plate. When the impeller rotates, the coolant between the vanes is thrown outward by centrifugal force.

The impeller shaft is supported by one or more sealed bearings. The sealed bearings never need to be lubricated. Grease cannot leak out, dirt and water cannot get in as long as the seal is not damaged or worn.

The purpose of the water pump is to circulate coolant throughout the cooling system. The water pump is driven by the crankshaft via the drive belt.

Oct 162017

Pontiac Grand Am

Description of Problem: I have a 2000 Pontiac Grand Am and just replaced the ignition switch. I did the passkey lock and everything with no problem. But the ignition only will start to the side not mounted in the dash where its supposed to be and I cant put my radio back in.


Not sure what you did or didn’t do. Best advice would be to go back over your work. You may want to take it all back apart and start from scratch to make sure no steps were missed. Check you connections.

Ignition and Start Switch Replacement Pontiac

(best viewed in Google Chrome or Firefox)
2000-pontiac-grand-am-ignition-and-start-switch-replacement-pontiac

Important
You must perform the BCM theft deterrent relearn procedure after replacement of the ignition switch lock cylinder.

Oct 162017

2007 Pontiac G5

How can I tell if my G5 has the VIC (Vehicle Information Center) or not. It has to do with programming a remote access AC Delco fob.


Pontiac refers to the information center as a Drivers Information Center (DIC) which is essentially the same thing. So as far as programming the new fob the answer would be yes it does.

Driver Information Center (DIC)

Your vehicle has a Driver Information Center (DIC). The DIC display gives you the status of many of your vehicle’s systems. The DIC is also used to display driver personalization menu modes and warning/status messages. All messages will appear in the DIC display, located at the bottom of the instrument panel cluster.

drivers information center button

The DIC buttons are located on the left side of the steering wheel.
(Information): Press this button to scroll through the vehicle information mode displays.

(Reset): Press this button to reset some vehicle information mode displays, select a personalization menu mode setting, or acknowledge a warning message.
Press and hold the information and reset buttons at the same time for one second, then release the buttons to enter the personalization menu.

Driver Information Center (DIC) Description and Operation

The driver information center (DIC) displays important vehicle information when it first powers up. The DIC is also used to display Odometer and Outside Air Temperature when other important vehicle information is not being displayed. The DIC switches are hardwired to and read by the instrument panel cluster (IPC). The IPC provides power to the DIC switches via the IPC ignition 1 voltage circuit fused in the body control module (BCM). The BCM is responsible for driving and processing the DIC display through GMLAN serial data. The BCM is responsible for reading the outside air temperature (OAT) and season odometer. The outside air temperature and season odometer is transmitted to the IPC over GMLAN for display in the DIC. The OAT data is transmitted in degrees Celsius and the cluster is responsible for converting the outside air temperature (OAT) to Fahrenheit.

There are 2 DIC buttons on the instrument panel cluster (IPC):

  • INFO
  • SET/RESET

The 2 DIC buttons however provide 3 switch functions. Pressing the INFO and SET/RESET button at the same time provides the MENU switch function.

INFO
The INFO button is used in order to navigate through the following driver information center (DIC) information modes:

  • AV VEHICLE SPEED
  • AV FUEL ECON
  • COOLANT TEMPERATURE
  • FUEL RANGE
  • OIL LIFE MONITOR
  • TRIP ODOMETER A
  • TRIP ODOMETER B

Other instrument panel cluster (IPC) information displayed in the DIC are Season odometer and Outside Air Temp.

Oct 092017

2006 Pontiac Montana

How do you reset the in dash temperature? Or the temperature sensor for ambient temperature, outside temperature? It is a 2006 Pontiac Montana SV6 with the 3.5 engine.


Ambient Temperature Sensor Replacement

There is no reset procedure. If the reading is off you may need to replace the sensor or check the wiring harness connections. The ambient outside temperature sensor is locate on the radiator support.

The radiator support flange mounts the ambient outside air temperature sensor near the radiator baffle. A 2-wire weather pack electrical connector attaches the ambient outside air temperature sensor to the forward lamp harness. In order to service the ambient outside air temperature sensor, perform the following steps:

  1. Disconnect the electrical connector (3) from the outside ambient air temperature sensor through the fascia opening.
  2. Remove the push in retainer (2).
  3. Remove the outside ambient air temperature sensor (1) from the vehicle.

ambient temperature sensor location diagram 2006 Pontiac Montana

Sep 282017

2005 Pontiac Vibe

Stopped running at all

I’m pretty much looking for some information on this transmission problem, before I set it on FIRE.
I recently bought an ’05 Pontiac Vibe for almost nothing ($500.00) now I know why. The previous owner stated that the original transmission had went bad (now I know there was a recall at one time) some time back and had a used one put in afterwards. Knowing that the same transmission is in both Pontiac and Toyota, I figured it couldn’t be too bad. I’ve always had good results from Toyota’s. So, with every car that I have bought, I give it routine maintenance; coolant flush, oil change, etc. On this particular vehicle after having the transmission flush and refilled along with new filter, 24 hours afterwards it started knocking like the flywheel was loose something horrible and then stopped running at all, NOTHING, just the sound of destruction. I inspected the flywheel and all bolts are intact and it torque convertor looks Ok from what I can see. Pretty much my question is to you is…Why would flushing the system cause that and what could possible be my problem? Is a new transmission in my future? Please help it Scotty before it BURNS!!!


The vehicle stopped running wouldn’t have much to do with the transmission. If it just quit moving then I would check to make sure the cv shafts are still intact. They can break and cause the vehicle to no longer move. This would also cause a horrible racket. I wouldn’t think this would have anything to do with changing fluids though.

Jun 262017

1970 Pontiac FirebirdSelecting an alternator

I recently add several electrical components to the engine and chassis.
Before selecting an alternator to handle the extra loads, I’ve been advised to compile a list of units and amp draws.
The add-ons list this info in their included literature, but I’m unable to find amp draws for the OEM units like: fan blower, headlights, ignition, radio etc.
Where I can I get this info?


Just use the max amp draw for that circuit. For example, the radio has a 5 amp fuse. even though this is the max amperage you could use it and be safe. Headlights use a 20 amp fuse. 30 amp for the blower. I would think just go for the largest available and you should be good. I am sure the 100 amp alternator would be fine but if you also have a hopped up stereo you may want to opt for the 130 amp alternator. Might as well through in an extra large battery as well.

Alternator Precautions

To prevent serious damage to the alternator and the rest of the charging system, the following precautions must be observed:

  • When installing a battery, make sure that the positive cable is connected to the positive terminal and the negative to the negative.
  • When jump-starting the car with another battery, make sure that like terminals are connected. This also applies when using a battery charger.
  • Never operate the alternator with the battery disconnected or otherwise on an uncontrolled open circuit. Double-check to ensure that all connections are tight.
  • Do not short across or ground any alternator or regulator terminals.
  • Don’t try to polarize the alternator.
  • Do not apply full battery voltage to the field (brown) connector.
  • Always disconnect the negative battery cable before disconnecting the alternator lead.