diff --git a/android/GnssConfiguration.cpp b/android/GnssConfiguration.cpp
index cee928ab..f52ae4bd 100644
--- a/android/GnssConfiguration.cpp
+++ b/android/GnssConfiguration.cpp
@@ -233,6 +233,11 @@ Return<bool> GnssConfiguration::setBlacklist(
         return false;
     }
 
+    // blValid is true if blacklist is empty, i.e. clearing the BL;
+    // if blacklist is not empty, blValid is initialied to false, and later
+    // updated in the for loop to become true only if there is at least
+    // one {constellation, svid} in the list that is valid.
+    bool blValid = (0 == blacklist.size());
     GnssConfig config;
     memset(&config, 0, sizeof(GnssConfig));
     config.size = sizeof(GnssConfig);
@@ -241,25 +246,33 @@ Return<bool> GnssConfiguration::setBlacklist(
 
     GnssSvIdSource source = {};
     for (int idx = 0; idx < (int)blacklist.size(); idx++) {
-        setBlacklistedSource(source, blacklist[idx]);
+        // Set blValid true if any one source is valid
+        blValid = setBlacklistedSource(source, blacklist[idx]) || blValid;
         config.blacklistedSvIds.push_back(source);
     }
 
-    return mGnss->updateConfiguration(config);
+    // Update configuration only if blValid is true
+    // i.e. only if atleast one source is valid for blacklisting
+    return (blValid && mGnss->updateConfiguration(config));
 }
 
-void GnssConfiguration::setBlacklistedSource(
+bool GnssConfiguration::setBlacklistedSource(
         GnssSvIdSource& copyToSource,
         const GnssConfiguration::BlacklistedSource& copyFromSource) {
 
+    bool retVal = true;
     copyToSource.size = sizeof(GnssSvIdSource);
 
     switch(copyFromSource.constellation) {
     case GnssConstellationType::GPS:
         copyToSource.constellation = GNSS_SV_TYPE_GPS;
+        LOC_LOGe("GPS SVs can't be blacklisted.");
+        retVal = false;
         break;
     case GnssConstellationType::SBAS:
         copyToSource.constellation = GNSS_SV_TYPE_SBAS;
+        LOC_LOGe("SBAS SVs can't be blacklisted.");
+        retVal = false;
         break;
     case GnssConstellationType::GLONASS:
         copyToSource.constellation = GNSS_SV_TYPE_GLONASS;
@@ -275,10 +288,13 @@ void GnssConfiguration::setBlacklistedSource(
         break;
     default:
         copyToSource.constellation = GNSS_SV_TYPE_UNKNOWN;
+        LOC_LOGe("Invalid constellation %d", copyFromSource.constellation);
+        retVal = false;
         break;
     }
 
     copyToSource.svId = copyFromSource.svid;
+    return retVal;
 }
 
 }  // namespace implementation
diff --git a/android/GnssConfiguration.h b/android/GnssConfiguration.h
index 15ee2906..96681b61 100644
--- a/android/GnssConfiguration.h
+++ b/android/GnssConfiguration.h
@@ -64,7 +64,7 @@ struct GnssConfiguration : public IGnssConfiguration {
 
  private:
     Gnss* mGnss = nullptr;
-    void setBlacklistedSource(
+    bool setBlacklistedSource(
             GnssSvIdSource& copyToSource,
             const GnssConfiguration::BlacklistedSource& copyFromSource);
 };
diff --git a/gnss/GnssAdapter.cpp b/gnss/GnssAdapter.cpp
index f3c7d5e2..90e1a50f 100644
--- a/gnss/GnssAdapter.cpp
+++ b/gnss/GnssAdapter.cpp
@@ -1101,10 +1101,14 @@ GnssAdapter::gnssSvIdConfigUpdate(const std::vector<GnssSvIdSource>& blacklisted
     memset(&mGnssSvIdConfig, 0, sizeof(GnssSvIdConfig));
 
     // Convert the sv id lists to masks
-    convertToGnssSvIdConfig(blacklistedSvIds, mGnssSvIdConfig);
+    bool convertSuccess = convertToGnssSvIdConfig(blacklistedSvIds, mGnssSvIdConfig);
 
-    // Now send to Modem
-    gnssSvIdConfigUpdate();
+    // Now send to Modem if conversion successful
+    if (convertSuccess) {
+        gnssSvIdConfigUpdate();
+    } else {
+        LOC_LOGe("convertToGnssSvIdConfig failed");
+    }
 }
 
 void
@@ -1288,10 +1292,11 @@ GnssAdapter::gnssGetConfigCommand(GnssConfigFlagsMask configMask) {
     return ids;
 }
 
-void
+bool
 GnssAdapter::convertToGnssSvIdConfig(
         const std::vector<GnssSvIdSource>& blacklistedSvIds, GnssSvIdConfig& config)
 {
+    bool retVal = false;
     config.size = sizeof(GnssSvIdConfig);
 
     // Empty vector => Clear any previous blacklisted SVs
@@ -1300,6 +1305,7 @@ GnssAdapter::convertToGnssSvIdConfig(
         config.bdsBlacklistSvMask = 0;
         config.qzssBlacklistSvMask = 0;
         config.galBlacklistSvMask = 0;
+        retVal = true;
     } else {
         // Parse the vector and convert SV IDs to mask values
         for (GnssSvIdSource source : blacklistedSvIds) {
@@ -1340,7 +1346,17 @@ GnssAdapter::convertToGnssSvIdConfig(
                 }
             }
         }
+
+        // Return true if any one source is valid
+        if (0 != config.gloBlacklistSvMask ||
+                0 != config.bdsBlacklistSvMask ||
+                0 != config.galBlacklistSvMask ||
+                0 != config.qzssBlacklistSvMask) {
+            retVal = true;
+        }
     }
+
+    return retVal;
 }
 
 void GnssAdapter::convertFromGnssSvIdConfig(
diff --git a/gnss/GnssAdapter.h b/gnss/GnssAdapter.h
index 7fbaf9cc..ad556877 100644
--- a/gnss/GnssAdapter.h
+++ b/gnss/GnssAdapter.h
@@ -327,7 +327,7 @@ public:
     static void convertSatelliteInfo(std::vector<GnssDebugSatelliteInfo>& out,
                                      const GnssSvType& in_constellation,
                                      const SystemStatusReports& in);
-    static void convertToGnssSvIdConfig(
+    static bool convertToGnssSvIdConfig(
             const std::vector<GnssSvIdSource>& blacklistedSvIds, GnssSvIdConfig& config);
     static void convertFromGnssSvIdConfig(
             const GnssSvIdConfig& svConfig, GnssConfig& config);