DeathByNissan55
Newbie
So I have a 1998 K1500 Z71 ext cab short bed 4x4 with 5.7L vortec.
First problem - Air bag light comes on intermittently (not wildly blinking or anything just doesnt come on right away but when on stays on for a while, sometimes turns back off, but not like a flickering issue or anything like that):
Code that i was able to get through friend's fancy schmancy Snap-On diagnostic scanner was "B1071 | Internal Sensing And Diagnostic Module Problem" and what I read on another site was that there is a module under the drivers seat that can fail where that would cause it, but that was only for cases where it was on all the time and not blinking. It basically is on all the time, just not when I start up and for a little while after i start up, is there like a self timer in the computer that waits a little bit before it does this "internal sensing" self check and thats why it takes a minute?
Also read that part has to be exact same part number as original if I replace it from one at junk yard. If someone has more info on the part, cheap places to buy it (besides salvage yards), the code the reader came up with, I'd really appreciate the help.
2nd problem - Climate Control airflow issue:
So to start off, i know this truck is capable of putting out hot heat and cold a/c - so dont say that maybe the heater core/related or AC/related are the problem.
I have replaced the climate control module (the device that has the temp, blower level, vent function/selection dials on it *without rear defrost*, below the stereo) with OEM AC delco unit that I got for very affordable price off amazon - still in ac delco box - since I paid chevy dealer (first mistake) to diagnose the issue with the old unit and they said there was an internal short which I believed because a bunch of the lights were out in it and the air movement didnt feel like how it should be. Even though it was replaced, the air flow still didnt feel like it changed, however the lights in the module were working *more* how they were supposed to except the AC and Recirculate orange lights seemed like they were on all the time I think whether head lights were on or off (and ac still worked how it was suppose to).
The problem I'm having is that I feel like the flow is severely restricted because at full blast, theres almost no airflow or at least not as much as I would imagine a truck would have, through the outer vents closest to door windows (the ones you can move, not the ones built into doors) when on the face setting. The blower resistor isnt bad (or at least I dont think it is) because air flow changes with each step of the dial and blower gets louder with each step of the dial.
I think the problem is with the blending because regardless of what function i have the vents set to, there is always air coming out at the windshield. However, when I change between face and feet and defog, you can feel the flow stopping at one and changing to the selected (not terribly quick) with the exception of the windshield. (I'll have to double check but I think the feet one might stay on a little bit too regardless of what function is selected).
I've read that there can be issues with electronic air handlers or doors or flaps or whatever they're called that direct the air flow based on the function selected, but you can still feel a change when the function is changed so I'm not 100% sure.
Dealer is trying to say that the climate control module needed to be "reprogrammed" and I've read in some places that there is nothing to program on them, that especially because it is an AC delco replacement it should have been preprogrammed if anything. Also, they want to charge me diagnostic fee again if this "reprogramming" doesnt work, which is dumb because they should have fully diagnosed the problem before instead of just stopping at the first problem they encounter....anyways, thats the problem with the climate stuff.
Third Problem - DRL (daytime running lights):
Regardless of the amount of ambient light, whenever I have the headlights switched off, it always says that it recommends headlights to be on (the little green headlight dash light) and the actual headlights will stay on. I currently have HID's, but this was doing this problem way before I did the HID mod.
Also, possibly related, when i had the door ajar sensor on the driver side still connected, it would always buzz the alarm like when you have the headlights on with the car off and you open the driver door - but it does it when the keys would be in the on position as well. It got so annoying that I unplugged the door ajar sensor (and broke it *sigh*). This also did this before I installed HID's, so HID's should not be the cause for any of this.
Also, possibly related, the cargo lights in back dont turn on when i press the override dome and the cargo light button. I have to do a combo of override button, turn the dimmer all the way up past 2 notches, and hit the cargo button......I figured it was just the head light switch.
4th problem - Reverse lights not working:
Like other 90's chevy's, I assumed this was because of reverse switch on transmission. Haven't had time to replace it, just wanted to ask to see if there was possibly any other causes. Reverse bulbs tested good, rest of lights work so dont think its a wiring issue.
Let me know, very much appreciated!!!!!
First problem - Air bag light comes on intermittently (not wildly blinking or anything just doesnt come on right away but when on stays on for a while, sometimes turns back off, but not like a flickering issue or anything like that):
Code that i was able to get through friend's fancy schmancy Snap-On diagnostic scanner was "B1071 | Internal Sensing And Diagnostic Module Problem" and what I read on another site was that there is a module under the drivers seat that can fail where that would cause it, but that was only for cases where it was on all the time and not blinking. It basically is on all the time, just not when I start up and for a little while after i start up, is there like a self timer in the computer that waits a little bit before it does this "internal sensing" self check and thats why it takes a minute?
Also read that part has to be exact same part number as original if I replace it from one at junk yard. If someone has more info on the part, cheap places to buy it (besides salvage yards), the code the reader came up with, I'd really appreciate the help.
2nd problem - Climate Control airflow issue:
So to start off, i know this truck is capable of putting out hot heat and cold a/c - so dont say that maybe the heater core/related or AC/related are the problem.
I have replaced the climate control module (the device that has the temp, blower level, vent function/selection dials on it *without rear defrost*, below the stereo) with OEM AC delco unit that I got for very affordable price off amazon - still in ac delco box - since I paid chevy dealer (first mistake) to diagnose the issue with the old unit and they said there was an internal short which I believed because a bunch of the lights were out in it and the air movement didnt feel like how it should be. Even though it was replaced, the air flow still didnt feel like it changed, however the lights in the module were working *more* how they were supposed to except the AC and Recirculate orange lights seemed like they were on all the time I think whether head lights were on or off (and ac still worked how it was suppose to).
The problem I'm having is that I feel like the flow is severely restricted because at full blast, theres almost no airflow or at least not as much as I would imagine a truck would have, through the outer vents closest to door windows (the ones you can move, not the ones built into doors) when on the face setting. The blower resistor isnt bad (or at least I dont think it is) because air flow changes with each step of the dial and blower gets louder with each step of the dial.
I think the problem is with the blending because regardless of what function i have the vents set to, there is always air coming out at the windshield. However, when I change between face and feet and defog, you can feel the flow stopping at one and changing to the selected (not terribly quick) with the exception of the windshield. (I'll have to double check but I think the feet one might stay on a little bit too regardless of what function is selected).
I've read that there can be issues with electronic air handlers or doors or flaps or whatever they're called that direct the air flow based on the function selected, but you can still feel a change when the function is changed so I'm not 100% sure.
Dealer is trying to say that the climate control module needed to be "reprogrammed" and I've read in some places that there is nothing to program on them, that especially because it is an AC delco replacement it should have been preprogrammed if anything. Also, they want to charge me diagnostic fee again if this "reprogramming" doesnt work, which is dumb because they should have fully diagnosed the problem before instead of just stopping at the first problem they encounter....anyways, thats the problem with the climate stuff.
Third Problem - DRL (daytime running lights):
Regardless of the amount of ambient light, whenever I have the headlights switched off, it always says that it recommends headlights to be on (the little green headlight dash light) and the actual headlights will stay on. I currently have HID's, but this was doing this problem way before I did the HID mod.
Also, possibly related, when i had the door ajar sensor on the driver side still connected, it would always buzz the alarm like when you have the headlights on with the car off and you open the driver door - but it does it when the keys would be in the on position as well. It got so annoying that I unplugged the door ajar sensor (and broke it *sigh*). This also did this before I installed HID's, so HID's should not be the cause for any of this.
Also, possibly related, the cargo lights in back dont turn on when i press the override dome and the cargo light button. I have to do a combo of override button, turn the dimmer all the way up past 2 notches, and hit the cargo button......I figured it was just the head light switch.
4th problem - Reverse lights not working:
Like other 90's chevy's, I assumed this was because of reverse switch on transmission. Haven't had time to replace it, just wanted to ask to see if there was possibly any other causes. Reverse bulbs tested good, rest of lights work so dont think its a wiring issue.
Let me know, very much appreciated!!!!!
